Does Microsoft 365 E3 Include OneDrive? (w/Examples) + FAQs

Yes. Every Microsoft 365 E3 license includes OneDrive for Business, starting at 1 TB of cloud storage per user, and that storage can be raised to 5 TB through the Microsoft 365 admin center without buying a separate SKU. Microsoft publishes this allocation directly inside the official OneDrive service description, which governs what customers are entitled to under their license agreement.

The problem many buyers face is simple: they pay for Microsoft 365 E3, assume “unlimited” storage is still in effect, and then discover that Microsoft retired the unlimited tier years ago. The governing document is the Microsoft Product Terms and the OneDrive service description, and the consequence of ignoring them is real — users who hit the quota can lose the ability to save new files, trigger ticket storms, and force emergency storage requests with Microsoft support.

A recent Microsoft licensing update shows how quickly this matters: on July 1, 2026, Microsoft 365 E3 list pricing moves from $36 to $39 per user per month, an 8% jump disclosed in the official 2026 Microsoft 365 pricing update. With price going up, understanding exactly what OneDrive entitlement you get inside E3 is no longer optional — it is a budget-line decision.

• 📦 What OneDrive storage, features, and caps actually come with Microsoft 365 E3
• 🔐 How E3 security, DLP, retention, and compliance layers protect OneDrive files
• ⚖️ How federal rules like HIPAA, FERPA, SOX, and SEC 17a-4 apply to OneDrive data
• 🧩 How E3’s OneDrive stacks up against E1, E5, Business Premium, F3, and Google Workspace
• 🛠️ Real admin workflows, mistakes to avoid, and named examples you can copy

What Microsoft 365 E3 Actually Includes

Microsoft 365 E3 is an enterprise productivity suite that bundles Office apps, Windows 11 Enterprise, Enterprise Mobility + Security (EMS) E3, and the full set of cloud services, including OneDrive for Business. The official Microsoft 365 E3 product page confirms that OneDrive is a first-party workload inside the suite, not an add-on. That matters because some customers still believe OneDrive is a separate purchase, and they end up paying twice.

The plain-English explanation is that E3 is a “per-user” subscription. When you assign an E3 license to a user in the Microsoft 365 admin center, that user automatically gets a provisioned OneDrive site, a 100 GB Exchange mailbox, Teams, SharePoint access, and the desktop Office apps. The consequence of not assigning a license is that the user cannot access their OneDrive at all, even if their files already exist — Microsoft places the account in a 30-day grace state before deletion, per the OneDrive retention policy.

A common misconception is that “Microsoft 365 E3” and “Office 365 E3” are the same product. They are not. Office 365 E3 does not include Windows 11 Enterprise or EMS E3, while Microsoft 365 E3 does, as spelled out in the Microsoft 365 Enterprise plan comparison. OneDrive entitlements are identical between the two, but the security tooling that protects OneDrive differs significantly, and that difference affects how safely regulated data can live in the cloud.

Here is a mini-scenario. Marcus Alvarado, an IT director at a 250-person engineering firm, buys Microsoft 365 E3 for every employee. On day one, each engineer gets 1 TB of OneDrive, a provisioned user mailbox, and Teams. Marcus uses the admin center to bump every engineer’s OneDrive cap to 5 TB because his CAD files are huge, and he does it without paying a cent extra because the raise is included in E3.

Core workloads bundled with E3

E3 includes Exchange Online Plan 2, SharePoint Online Plan 2, OneDrive for Business Plan 2, Teams, Viva Connections, Viva Engage, Microsoft Purview features, Intune, Entra ID P1, and Microsoft Defender for Office 365 Plan 1 only if added separately (it is not bundled). The Microsoft 365 E3 service description map details every component. The why behind this bundling is Microsoft’s push to sell “platform” rather than isolated apps, because platform selling increases customer lock-in and average revenue per user.

The consequence of not reading the service description is subtle but costly. Teams is technically unbundled for new E3 purchases sold in the EU and EEA, and Microsoft launched a separate SKU called Microsoft 365 E3 (no Teams) at a lower price. If a global company buys the wrong SKU for the wrong region, they may end up with no Teams client, no calling plan, and a compliance gap inside OneDrive-to-Teams file sharing flows.

A real-world example: Priya Raman, a procurement lead at a Lithuanian manufacturer, bought Microsoft 365 E3 (no Teams) to save money, then discovered her frontline workers could not launch Teams meetings from OneDrive shared links. The fix was to add standalone Teams Enterprise licenses, which cost her the savings she thought she locked in.

Where OneDrive fits in the suite

OneDrive for Business is the personal cloud drive attached to each E3-licensed user, while SharePoint Online is the shared team site layer, and Teams sits on top as the collaboration UI. The Microsoft 365 architecture guide explains that OneDrive and SharePoint share the same storage backend under the hood, which is why a file saved in a Teams chat is actually stored in the sender’s OneDrive.

The consequence of misunderstanding this architecture is data sprawl. When users do not realize that Teams chat files live in OneDrive, they delete their OneDrive without thinking, and the Teams chat attachments vanish with them. The why is that Microsoft designed OneDrive to be the personal container and SharePoint to be the group container, and Teams simply surfaces both.

A common misconception is that OneDrive and SharePoint have separate quotas in every case — they do, but they both consume tenant-level SharePoint storage under specific allocation rules described in the SharePoint storage limits. E3 customers get an organization baseline of 1 TB of SharePoint storage plus 10 GB per licensed user, which is independent from each user’s OneDrive quota.

OneDrive Storage Under Microsoft 365 E3

Under Microsoft 365 E3, each licensed user receives 1 TB of OneDrive storage by default, with the option to raise it to 5 TB through the admin center, according to the OneDrive service description. Beyond 5 TB, customers must open a support case to request additional storage, and Microsoft reviews each request against eligibility criteria tied to the number of licensed users and current consumption.

The why behind this cap is that Microsoft retired the “unlimited OneDrive” marketing promise years ago after abuse cases where individual users uploaded hundreds of terabytes of personal video libraries. The consequence of hitting the cap is immediate and painful: file uploads fail silently in the sync client, shared links stop working for new content, and users must delete files or request admin help before OneDrive works again.

A common misconception is that every E3 customer automatically gets 5 TB from day one. They do not. The default provisioned quota is 1 TB per user, and the path to 5 TB requires an administrator to change the setting in the Microsoft 365 admin center storage controls. Subscriptions with fewer than five users are also capped at 1 TB, which burns many small professional practices that bought E3 seats for high-volume data work.

Here is a named example. Dr. Elena Chen, a radiologist running a 3-person teleradiology practice, bought three Microsoft 365 E3 seats expecting to store DICOM image archives in OneDrive. She discovered that under-five-user tenants are ineligible for the 5 TB bump, so she had to migrate image archives to Azure Blob Storage while keeping E3 for email, Teams, and Office apps.

Raising the cap from 1 TB to 5 TB

Administrators raise the default storage by opening the Microsoft 365 admin center, navigating to SharePoint admin, choosing “Settings,” selecting “OneDrive storage limit,” and changing the value from 1024 GB to 5120 GB. Microsoft documents this exact flow in the set default storage space guide. The change applies to new and existing users, which is a critical nuance many admins miss.

The consequence of skipping this step is that users quietly hit the 1 TB cap during large project migrations and open help-desk tickets. Microsoft does not automatically notify administrators when a user is approaching the quota unless a custom alert is configured, so proactive monitoring is essential. Configuration of alerts is covered in the OneDrive reports in the admin center.

A common misconception is that raising the cap costs extra money. It does not — it is included in Microsoft 365 E3. The only time extra cost kicks in is beyond 5 TB per user, when Microsoft evaluates additional allocation on a case-by-case basis, and only for tenants with more than five licensed users actively consuming at least 90% of their current allocation.

Beyond 5 TB and the retired “unlimited” tier

Beyond 5 TB, administrators file a support ticket requesting more storage, and Microsoft will typically allocate additional 25 TB OneDrive sites under specific conditions outlined in the OneDrive service description. The why is archival and compliance-driven workloads — legal holds, long-tail medical imaging, media production, and engineering CAD archives frequently push past 5 TB per user.

The consequence of assuming “unlimited” still applies is budget shock when an auditor discovers that heavy users cannot expand further without a storage request, and that the request can take days or weeks to process. A common misconception is that E5 customers get unlimited OneDrive — they do not. E5 has the exact same 1 TB default and 5 TB admin-raised cap as E3, per the same service description table.

Jamal Washington, a media archivist at a documentary film company, learned this the hard way when his raw-footage archive hit 4.7 TB and he assumed he could auto-expand. He had to open a support ticket, justify the expansion, and wait ten business days before Microsoft granted him an additional 25 TB allocation.

Storage scenarios at a glance

Security, Compliance, and Governance for OneDrive in E3

Microsoft 365 E3 wraps OneDrive in a layered security and compliance stack that includes Microsoft Purview Information Protection, Data Loss Prevention (DLP), retention policies, eDiscovery Standard, and Conditional Access through Entra ID P1. These controls are documented in the Microsoft Purview data security solutions guide. Without them, OneDrive is just a file share, and regulated industries cannot use it for sensitive data.

The plain-English explanation is that Purview lets administrators label files like “Confidential,” automatically block sharing with external parties, retain files for legal hold, and search across all OneDrive accounts for eDiscovery requests. The consequence of not configuring these tools is a direct compliance violation — a single HIPAA breach can cost up to $1.5 million per violation category per year, per the HHS civil monetary penalty schedule.

A common misconception is that Microsoft 365 E3 includes everything a regulated business needs. It does include the baseline, but Microsoft 365 E5 adds advanced DLP, insider risk management, communication compliance, and eDiscovery Premium. For a healthcare group running HIPAA workloads, E3 is workable only if paired with a signed HIPAA Business Associate Agreement from Microsoft, which covers OneDrive by default once the customer signs it.

A named example: Fatima Obi, a compliance officer at a mid-sized hospital network, turned on DLP policies in E3 to block OneDrive sharing of documents containing social security numbers or medical record numbers. She then layered retention policies to hold clinical files for seven years, satisfying both HIPAA and state medical record retention rules, without moving to E5.

HIPAA and healthcare OneDrive use

HIPAA-covered entities can legally store Protected Health Information (PHI) in OneDrive under Microsoft 365 E3, but only after executing Microsoft’s HIPAA BAA through the volume licensing portal. The why is that HIPAA requires a written contract obligating the cloud vendor to safeguard PHI, and Microsoft’s BAA provides that contract.

The consequence of skipping the BAA is catastrophic: any PHI uploaded to OneDrive becomes an unauthorized disclosure under 45 CFR 164.502, which triggers breach notification obligations and Office for Civil Rights enforcement. A common misconception is that “Microsoft is HIPAA certified” — HIPAA has no certification program, and the BAA is the only legal protection available under the HHS HIPAA cloud guidance.

Dr. Nathan Park, a primary care physician, stored patient intake forms in OneDrive without signing the BAA. After an audit, OCR issued a corrective action plan requiring him to execute the BAA, re-train staff, and report the incident as a breach — even though no external disclosure occurred.

FERPA, SOX, and SEC 17a-4 considerations

FERPA-covered schools can store student education records in OneDrive under E3 if the district signs Microsoft’s FERPA-aligned terms in the Microsoft education compliance offerings. SOX controls rely on Purview audit logs inside E3, which retain 180 days of user activity by default. For SEC 17a-4 broker-dealer records, E3 alone is not enough — firms need the WORM-compliant retention features available via Microsoft Purview Records Management, which is included in E5 or sold as a standalone add-on.

The consequence of using plain E3 for broker-dealer record retention is that audit logs and retention policies may not meet the SEC Rule 17a-4(f) requirement for non-rewriteable, non-erasable storage. A common misconception is that E3 retention policies satisfy 17a-4 — they do not, because they are “delete” policies, not immutable WORM storage.

Sarah Nguyen, a compliance officer at a FINRA-registered broker-dealer, turned on E3 retention for email and OneDrive, then failed a SEC exam because the policies allowed administrative deletion. She resolved the gap by adding the Microsoft Purview Records Management add-on on top of E3.

Sharing controls and Known Folder Move

E3 includes the OneDrive Known Folder Move (KFM) feature, which redirects Desktop, Documents, and Pictures folders into OneDrive automatically. This reduces endpoint data loss because local folders sync to the cloud whenever a device is stolen or wiped. The consequence of not enabling KFM is that users save files to local folders that are never backed up, and a lost laptop becomes a data loss event.

Sharing governance is controlled through the SharePoint and OneDrive external sharing settings. Admins can restrict external sharing to specific domains, require authenticated guest access, and set link expiration dates. A common misconception is that “Anyone” links expire automatically — they do not unless an admin configures a link expiration policy at the tenant level.

How Microsoft 365 E3 Compares to Other Plans

Microsoft 365 E3 sits in the middle of the enterprise lineup, priced at $36 per user per month through June 30, 2026, rising to $39 per user per month on July 1, 2026 per the 2026 Microsoft pricing update. The why behind the increase is Microsoft’s shift to roll more Copilot and security value into base SKUs, and the consequence is that multi-year renewals locked in before July 2026 protect the old price for the length of the agreement.

A common misconception is that Business Premium and E3 are interchangeable. They are not — Business Premium caps out at 300 seats, which is a hard ceiling described in the Microsoft 365 Business Premium overview. The consequence of relying on Business Premium past 300 users is that you cannot add the 301st user and must migrate the entire tenant to an enterprise SKU like E3.

A concrete example: Rafael Mendes, the COO of a 280-person consulting firm, chose Business Premium to save on licensing costs. When the firm grew to 310 employees, he scrambled to swap every user to Microsoft 365 E3, a migration that took weeks and cost consulting fees on top of the price difference.

E3 vs. E1, E5, Business Premium, F3

Pricing data comes directly from the Microsoft 365 pricing and packaging update. Storage limits come from the OneDrive service description table.

E3 vs. Google Workspace Enterprise and Dropbox Business

Google Workspace Enterprise offers “as much storage as you need” on request, starts around $23 per user per month, and ships with Gmail, Drive, Docs, and Meet per the Google Workspace pricing page. Dropbox Business Advanced offers “as much space as needed” at roughly $24 per user per month but does not include email, per the Dropbox Business plans page. The why behind choosing E3 is often the Windows 11 Enterprise and EMS bundle, which neither Google nor Dropbox can match.

The consequence of choosing Google Workspace Enterprise over Microsoft 365 E3 is losing native Office file compatibility at the desktop level and losing Intune-based device management. A common misconception is that Dropbox is cheaper per gigabyte — it is only cheaper if you ignore that E3 includes email, Teams, Office apps, and Windows Enterprise in the same price.

Common Mistakes to Avoid

Mistakes with OneDrive under Microsoft 365 E3 usually come from administrators assuming defaults will protect them. The Microsoft 365 admin documentation spells out each of the following mistakes, and each one carries a specific consequence.

• Leaving default OneDrive quota at 1 TB when users clearly need 5 TB, causing silent upload failures during migration windows.
• Not signing the HIPAA BAA before storing PHI, triggering an automatic breach notification under 45 CFR 164.404.
• Assuming unlimited storage still exists, budgeting projects around capacity that Microsoft retired.
• Ignoring Known Folder Move, so endpoint data is never synced and stolen laptops cause permanent data loss.
• Allowing “Anyone” links with no expiration, creating perpetual public exposure of confidential files.
• Buying Office 365 E3 instead of Microsoft 365 E3, then discovering there is no Windows 11 Enterprise or Intune.
• Forgetting retention policy scope, so OneDrive files are deleted 30 days after license removal and cannot be recovered.
• Purchasing Business Premium above 300 seats, forcing a painful mid-growth tenant migration.
• Skipping DLP configuration, so sensitive data like SSNs move freely into OneDrive shared links.
• Misunderstanding E3 (no Teams) in EU regions, leaving users without a meetings client.

Each mistake has a named pattern in the Microsoft 365 adoption guide, and each resolution is a configuration change, not a new license purchase.

Do’s and Don’ts for OneDrive Under E3

These rules will keep administrators out of trouble and keep users productive under Microsoft 365 E3. The OneDrive admin best practices guide lays them out in detail.

• Do raise the default OneDrive quota to 5 TB proactively, because waiting until a user hits 1 TB creates sync failures.
• Do enable Known Folder Move for all users, because endpoint data loss is the most common support ticket category.
• Do sign the Microsoft BAA before any PHI, FERPA record, or regulated data touches OneDrive.
• Do configure DLP policies with sensitive-information types, because Microsoft will not auto-block SSNs without a rule.

• Do enable external sharing link expiration, because “Anyone” links are the single biggest OneDrive leak vector.

• Don’t assume Office 365 E3 and Microsoft 365 E3 are the same plan, because the Windows and EMS entitlements differ.

• Don’t rely on default 180-day audit retention for SOX or SEC, because regulators typically demand multi-year retention.
• Don’t delete an employee’s OneDrive immediately after termination, because you lose the 30-day recovery window.
• Don’t share OneDrive files through unmanaged guest accounts, because Entra ID P1 Conditional Access cannot enforce policies on them.
• Don’t buy extra OneDrive storage before exhausting the free 5 TB admin raise, because that raise is already paid for in E3.

Pros and Cons of Microsoft 365 E3 for OneDrive

Microsoft 365 E3 is a strong OneDrive vehicle for most organizations, but it is not perfect. The Gartner Magic Quadrant for Content Services Platforms consistently places Microsoft as a Leader, and the Forrester Wave for cloud collaboration identifies the same strengths and weaknesses described below.

• Pro: 1 TB default with a free 5 TB raise matches the needs of most knowledge workers, and the path to expansion is administrator-controlled.
• Pro: Purview DLP, retention, and eDiscovery Standard are bundled, meaning regulated industries can meet baseline compliance without E5.
• Pro: Windows 11 Enterprise and Intune are included, so endpoint management and OneDrive sync policies live in one console.
• Pro: Microsoft signs a HIPAA BAA covering OneDrive, enabling healthcare use without a premium upgrade.

• Pro: Known Folder Move ships as a free feature, so desktop data is continuously backed up to OneDrive with zero user action.

• Con: Advanced DLP, insider risk, and eDiscovery Premium are E5-only, forcing heavily regulated firms to upgrade.

• Con: The default 1 TB quota requires an admin change to reach 5 TB, and Microsoft does not auto-raise it.
• Con: Tenants under five users are ineligible for the 5 TB raise, penalizing small specialist practices.
• Con: SEC 17a-4 WORM retention is not native to E3, requiring a Purview Records Management add-on.
• Con: Pricing rises 8% in July 2026, increasing total cost of ownership even without added functionality.

Processes and Admin Steps to Configure OneDrive in E3

Admins configure OneDrive through two primary consoles: the Microsoft 365 admin center for license assignment and the SharePoint admin center for tenant-level storage controls. Every step below comes straight from the OneDrive deployment guide.

First, assign the Microsoft 365 E3 license to the user in the admin center under Users > Active Users, which provisions the OneDrive site automatically within minutes. The consequence of not assigning the license is that the user cannot log into OneDrive at all, and any attempt to share files with them fails.

Second, raise the default OneDrive storage quota in the SharePoint admin center under Settings > OneDrive > Storage. Change the value from 1024 GB to 5120 GB. The consequence of skipping this is that users hit the 1 TB cap during large migrations.

Third, enable Known Folder Move through the OneDrive sync client policies, either via Intune or Group Policy. This redirects Desktop, Documents, and Pictures to OneDrive, which protects against local device loss. The consequence of not enabling KFM is that a lost laptop means lost files.

Fourth, configure sharing policies at the tenant level to restrict external sharing to authenticated guests, set link expiration to 30 days, and disable “Anyone” links for sensitive sites. The external sharing configuration guide covers each toggle.

Fifth, configure Purview DLP and retention through the Microsoft Purview compliance portal, applying baseline policies for sensitive data types relevant to the organization. The consequence of skipping DLP is that sensitive content leaks through shared links, and the retention gap leaves the organization unable to meet legal hold.

Key Entities and How They Relate

The core entities in this topic are Microsoft, the Microsoft 365 E3 license, OneDrive for Business, SharePoint Online, Microsoft Entra ID, Microsoft Purview, the Microsoft 365 admin center, and the Microsoft Product Terms. Microsoft publishes the Microsoft 365 service trust portal as the single source of truth on how these entities interact.

Microsoft is the cloud provider, the license defines the entitlements, OneDrive is the storage workload, SharePoint is the shared-content backbone, Entra ID is the identity layer, Purview is the governance layer, the admin center is the control plane, and the Product Terms is the legal contract. Each entity depends on the others — break one and the rest degrade quickly.

Relevant Rulings and Enforcement Precedents

The OCR HIPAA resolution agreements include multiple settlements where cloud-stored PHI without a BAA triggered penalties, including the 2016 settlement with Oregon Health & Science University for $2.7 million, where an unsecured cloud repository of PHI was a core finding. The why behind the settlements is consistent: no BAA, no lawful storage.

The SEC enforcement actions for 17a-4 violations include more than a dozen 2022 and 2023 settlements exceeding $1 billion collectively against broker-dealers that used cloud messaging and storage without WORM-compliant retention. These rulings directly apply to any financial firm using Microsoft 365 E3 OneDrive without the Records Management add-on.

FAQs

Does Microsoft 365 E3 include OneDrive?

Yes. Microsoft 365 E3 includes OneDrive for Business with 1 TB of storage per licensed user, raisable to 5 TB by an administrator through the Microsoft 365 admin center at no extra cost.

Does Microsoft 365 E3 give unlimited OneDrive storage?

No. Microsoft retired the unlimited OneDrive tier. E3 provides 1 TB by default, 5 TB via admin raise, and beyond 5 TB only through a Microsoft support ticket with eligibility review.

Can I use OneDrive under E3 for HIPAA-regulated data?

Yes. You can store PHI in OneDrive under Microsoft 365 E3, but you must first sign Microsoft’s HIPAA Business Associate Agreement through the volume licensing portal before any PHI is uploaded.

Does Microsoft 365 E3 satisfy SEC Rule 17a-4 for broker-dealers?

No. E3 retention policies are deletion-based, not WORM-compliant. Broker-dealers must add Microsoft Purview Records Management or upgrade to E5 to meet 17a-4(f) immutability requirements.

Is OneDrive storage in E3 the same as in E5?

Yes. Both Microsoft 365 E3 and E5 provide 1 TB default OneDrive storage with a 5 TB admin-raised cap, per the official OneDrive service description published by Microsoft Learn.

Can I buy more OneDrive storage separately under E3?

Yes. Beyond the 5 TB cap, administrators can open a support ticket requesting additional 25 TB OneDrive sites, subject to eligibility based on current usage and licensed user count.

Does Microsoft 365 E3 include SharePoint storage too?

Yes. E3 includes SharePoint Online Plan 2 with a tenant baseline of 1 TB plus 10 GB per licensed user, separate from each user’s personal OneDrive quota.

Will OneDrive data be deleted when I remove an E3 license?

Yes. OneDrive enters a 30-day grace period after license removal, then Microsoft purges the site unless retention policies or legal holds are configured in Microsoft Purview first.

Is Microsoft 365 E3 cheaper than Google Workspace Enterprise?

No. E3 is listed at $36 per user per month, rising to $39 in July 2026, while Google Workspace Enterprise starts around $23 per user per month with negotiable storage allocation.

Does Microsoft 365 E3 include Microsoft Teams?

Yes. The standard Microsoft 365 E3 SKU includes Teams, but in the EU and EEA Microsoft sells a separate E3 (no Teams) SKU, so regional buyers should verify the exact SKU before purchase.

Is Known Folder Move included with Microsoft 365 E3?

Yes. Known Folder Move is a free feature of OneDrive for Business under E3, redirecting Desktop, Documents, and Pictures folders into OneDrive for automatic endpoint backup.

Can small businesses with fewer than 5 users get 5 TB of OneDrive under E3?

No. Microsoft caps OneDrive at 1 TB per user for tenants with fewer than five licensed seats, regardless of whether the license is Microsoft 365 E3 or E5.