Signed up for 365 subscription on wrong identity account - Google / Microsoft Authentication with same email

Question

I am trying to get access to the Copilot Tasks feature, and I signed up for the 365 pro plan with this capability. However, I found out that logging into the same email address is not the same account for how I have been using Copilot. I have been logging into Copilot via the Sign in with Google, and I signed up in 365 with my same email but it authenticates with Microsoft. The problem is apparently even though the email is the same, the authentication methods make it two different identity accounts and nothing is shared between the Copilot sessions. I have all my business stuff on my google authentication side, and now I have the upgraded plan on the Microsoft side.

Is there any way to fix this issue. I don't believe there is anyway to carry over the history from one to another, but is it possible to sign up for the 365 under the google authentication?

Answer 1

Hi, Taylor Parker

Yes, this is basically an identity split. The same email address can exist as a Google sign-in identity and as a Microsoft account, but Microsoft services may treat them as separate accounts, so history and subscription benefits do not automatically follow each other.

Besides the solutions provided by the Q&A Assist, here are some suggestions you can try:

The best practical workaround is to use the Microsoft account that owns the Microsoft 365 subscription as the “paid” account, then add or link the Gmail/Google mailbox where supported. In the new Outlook, Microsoft has a “Link Accounts” option for third-party mail accounts such as Gmail, Yahoo, or iCloud when the Microsoft 365 subscription uses the same email identity. This can unlock premium Outlook features, including Copilot, for that linked mailbox where available.

It is also recommended that you sign into the Microsoft 365 apps with both accounts, then check whether Copilot works against files you can open from the other account. If one signed-in Microsoft account has a Copilot-eligible Microsoft 365 subscription, Copilot may be usable with files owned by other signed-in Microsoft accounts, provided you have permission to open those files.

If the problem is mainly that the sign-in screen keeps choosing the wrong account, another option is to rename/change the sign-in alias of the personal Microsoft account so it no longer visually clashes with the Google/Gmail identity. This will not merge the accounts, but it can reduce confusion when signing in. Google credentials cannot be used directly to sign into a Microsoft account, although a Gmail address can be used as a Microsoft account sign-in alias/proof method.

If the paid plan is still new and the above does not give access to the feature you need, the cleanest route may be to contact Microsoft support and ask whether the subscription can be cancelled/refunded, then repurchase using the identity you actually intend to use going forward. I would not spend too much time trying to “merge” them, because that part is not currently supported.

Please be advised that this is a user-to-user support forum. Moderators and contributors, including external Microsoft employees, are not allowed to directly interfere with Microsoft product features or access back-end systems. Our role is limited solely to providing technical guidance on reported incidents, requests, or ideas.   

Thank you for your patience in reading, I hope this information has been helpful to you. 

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Answer 2

Microsoft Account (MSA) identities and Google-based identities are separate, even if they use the same email address. The Copilot data and entitlements associated with “Sign in with Google” are not shared with, or transferable to, the Microsoft 365 subscription that was purchased on the Microsoft side.

Key points based on how identities work:

1. Different identity types
   • A Microsoft Account (MSA) is a personal Microsoft identity used for services like Outlook, OneDrive, Xbox, and Microsoft 365 subscriptions.
   • A Google sign-in is a third‑party identity provider. When used with Copilot, it creates a separate identity context from an MSA, even if the email string is identical.
   • Because they are different identity systems, Copilot sessions, history, and licenses do not merge across them.
2. Copilot data and history
   • Chat history and “business stuff” created while signed in with Google are bound to that Google-based identity.
   • Content and features available under the Microsoft 365 subscription are bound to the MSA identity used to purchase the subscription.
   • There is no supported way in the provided documentation to migrate or merge Copilot history or data between these two identities.
3. Licensing and sign-in
   • Microsoft 365 subscriptions and Copilot licenses are attached to a Microsoft Account (MSA) or Microsoft Entra ID (work/school). They are not shown as being attachable directly to a Google identity.
   • The documentation describes using multiple Microsoft accounts (personal MSA and work/school Entra ID) with Copilot and sharing Copilot access across accounts in supported apps, but it does not describe purchasing or binding a Microsoft 365 subscription directly to a Google-authenticated identity.
4. What can be done
   • The subscription must remain associated with the Microsoft identity used to purchase it.
   • To use the upgraded Copilot capabilities with existing content, that content would need to be accessed while signed in with the Microsoft identity that holds the subscription (for example, by storing or opening files under that account in supported Microsoft 365 apps).
   • The context does not provide a supported method to:
     • Move the subscription from the Microsoft identity to the Google identity, or
     • Sign up for Microsoft 365 “under” the Google authentication in a way that merges them into a single identity.

Within the provided documentation, there is therefore no supported way to:

• Transfer Copilot history from the Google-based sign-in to the Microsoft 365 subscription identity, or
• Directly sign up for and bind a Microsoft 365 subscription to the Google-authenticated identity so that both behave as one account.

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References:

• Getting started with Microsoft Copilot
• How to use Copilot when signed in with one or more account
• Multiple account access to Microsoft 365 Copilot for work and school documents
• Sharing Copilot in Outlook