switch my primary email for subscription for 365

You cannot transfer the existing Microsoft 365 Family subscription from email A to email B; to make B the owner, let A’s subscription expire, purchase a new Family subscription with B, and then share it back to A.[^1^](https://support.microsoft.com/accounts-billing/subscriptions/[Subscription ID] "Transfer a Microsoft 365 subscription to another account | Microsoft Support")

Email B currently lacks Copilot in Word, Excel, and Outlook because those AI benefits are available only to the subscription owner—not members receiving a shared Microsoft 365 Family subscription.^2^

Change ownership from A to B

1. Sign in with email A at the Microsoft account Services & subscriptions page.
2. Find Microsoft 365 Family, select Manage, and choose Turn off recurring billing.
   • Do not purchase the replacement under B yet if you want to avoid overlapping subscriptions.
   • A’s subscription continues until its displayed expiration date.
3. Wait until A’s subscription expires. Microsoft does not provide an in-term ownership transfer option.[^1^](https://support.microsoft.com/accounts-billing/subscriptions/[Subscription ID] "Transfer a Microsoft 365 subscription to another account | Microsoft Support")
4. Sign in with email B and purchase Microsoft 365 Family. Email B then becomes the subscription owner and receives the owner-only Copilot features.
5. Using email B, open the Microsoft 365 sharing page:
   https://account.microsoft.com/services/office/sharing
6. Select Share, then choose Email invite or Create link and invite email A.
7. Sign in as email A and accept the invitation. A becomes a shared member and retains its own separate email, files, and Microsoft account.[^3^](https://support.microsoft.com/accounts-billing/subscriptions/[Subscription ID] "Share your Microsoft 365 subscription | Microsoft Support")

Family-group transition

Because accepting subscription sharing places B in A’s family group, the existing family-group arrangement may need to be changed before A can accept B’s new invitation.

If either account receives an “already in another family group” message, it must leave that existing family group before accepting the new invitation. Sharing works only while the recipient belongs to the new subscription owner’s family group.[^3^](https://support.microsoft.com/accounts-billing/subscriptions/[Subscription ID] "Share your Microsoft 365 subscription | Microsoft Support")

Temporary Copilot option before expiration

Until B becomes the owner, add both A and B to the same Word, Excel, or Outlook desktop app. If A—the licensed owner—is signed in and has permission to access B’s file, Copilot may be used on that file; usage consumes A’s AI credits.^4^

This does not transfer Copilot benefits to B: A must remain signed into that application, and A must have access to the file.

References

1. [Transfer a Microsoft 365 subscription to another account | Microsoft Support](https://support.microsoft.com/accounts-billing/subscriptions/[Subscription ID])
2. Frequently asked questions about Copilot in Microsoft 365 subscriptions | Microsoft Support
3. [Share your Microsoft 365 subscription | Microsoft Support](https://support.microsoft.com/accounts-billing/subscriptions/[Subscription ID])
4. Copilot use when multiple accounts are added to Microsoft 365 apps | Microsoft Support