You can add multiple accounts to Microsoft 365 apps such as Word, Excel, PowerPoint, Outlook, and OneNote, and access files if you have the necessary permissions.
If any of the accounts signed into a Microsoft 365 app has a Copilot license, you may also be able to use Copilot with files owned by other accounts. However, this depends on whether the file is owned by a work or school account, and what type of Copilot license you have.
Note: You could have a Microsoft 365 Copilot license through your work or school, a Copilot Pro license you purchased at home, or a license through your Microsoft 365 Family or Personal account.
The following table outlines what type of accounts can use Copilot on files you can access, based on which Microsoft account owns the file.
|
Type of Copilot license |
File owned by |
|---|---|
The account with the Copilot license
A different Microsoft account
A different work or school organization
Microsoft account with a Microsoft 365 Personal or Family subscription*
Yes
Yes
No
Microsoft account with Copilot Pro subscription
Yes
Yes
No
Work or school account with a Microsoft 365 Copilot subscription
Yes
Yes
No
Microsoft accounts with a Copilot license
If your Microsoft account has a Copilot Pro subscription or a Microsoft 365 Personal or Family subscription, and you added one or more additional Microsoft accounts to your app, you'll be able to access the files from the other Microsoft accounts and use Copilot on those files even if those accounts don't have a Copilot license.
When multiple accounts are signed into the same application, and the only account that has access to Copilot is a Microsoft 365 Personal or Family subscription, AI credits will be counted whenever Copilot is used on any open document.
Note: AI benefits are only available to the subscription owner and cannot be shared with additional Microsoft 365 Family members. Visit Understanding AI credits for more on how AI credits are counted.
However, you won't be able to use your Microsoft account with Copilot on any files owned by a work or school organization unless you have also signed in with a work or school account from that organization, and that account has a Copilot license assigned to it.
Work or school accounts with a Copilot license
If your work or school account has a Copilot license, you can use Copilot features on files owned by that work or school organization, or files owned by other Microsoft accounts if you have permissions to open those files with one of the signed in accounts.
You cannot use Copilot on any files owned by a different work or school organization unless that work or school organization has granted a Copilot license to the account accessing the file.
Note: See here for more information on multiple account access to Copilot for work and school documents.
