Multiple account access to Copilot in Microsoft 365 desktop and mobile apps

Updated October 1, 2025: Today we announced multiple updates to our Microsoft 365 subscription lineup for individuals. Multiple account access allows individuals with these subscriptions to access Microsoft 365 Copilot value while at work through the Microsoft 365 apps.

As mentioned previously, enterprise data protection continues to apply for files accessed with the user’s organizational identity, regardless of which account grants Copilot access. Learn more about what this means for your organization.

If you wish to restrict multiple account access to Copilot, you can use the “Multiple account access to Copilot for work documents” Cloud Policy.

For more information, refer to documentation.

Multiple account access to Copilot in Microsoft 365 desktop and mobile apps will be available soon.

When will this happen

General availability (Worldwide): We will begin rolling out in early March 2025 and expect to complete by early July 2025 (previously mid-June).

Cloud Policy to manage use will be available by late January 2025.

How this will affect your organization

As an M365 service, Copilot can be used across signed in accounts in clients that allow you to sign in with multiple accounts. This lets users use their Copilot value on any document to which they have permission. Note that Copilot data protection is always based on the identity used to access the file. This ensures enterprise data protection for files in your organization, regardless of which account grants Copilot access. The setting for web grounding in Copilot is also based on the identity used to access the file. If you disabled web grounding in Copilot, users will not be able to use web grounding even when using Copilot access from another account. This feature will be available starting in March 2025, at which point, users signed into accounts with external Copilot licenses will be able to use Copilot on their work and school documents in Word, Excel, PowerPoint, Outlook and OneNote desktop and mobile apps.

What you need to do to prepare

If you wish to restrict multiple account access to Copilot, you can use the “Multiple account access to Copilot for work documents” Cloud Policy.  This policy setting is expected to be available in Cloud Policy by the end of January 2025

Additional information

For more information, see Multiple account access to Copilot for work and school documents.