Managing different outlook accounts with 365 subscription

Val C 0 Reputation points
2026-11-14T01:57:15.7466667+00:00

I have a paid MS365 subscription using email address A, ******@outlook.com. I also have several other outlook.com email addresses - addresses A, B and C. For personal reasons I no longer want to have anything associated with address A (ex-partner's name!) and have tried to switch to address B. However, I can't add it as an alias to my paid account because it says it is already taken... which it is, by me! How can I resolve this?

Outlook | Web | Outlook.com | Account management, security, and privacy
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  1. GsN5034 - IA 79,595 Reputation points Independent Advisor
    2026-11-14T03:22:29.61+00:00

    Hello,

    You can’t add an existing Hotmail, Live, Outlook.com, or MSN address as an alias. You also can’t add an address that’s already associated with another Microsoft account.

    Because address A is already linked to a Microsoft account, you can’t add it to another Microsoft account.

    If you want to change the email address (alias) for account A, create a new alias, make it the primary alias, and then remove the address that ends with your partner’s name.

    • Sign in with your Microsoft Account email address (A) here: https://account.live.com/names/manage
    • Select Add email.
    • Create a new email address and add it as an alias.
    • After adding it, you can make the new email address your primary alias.

    If you no longer want to use the address that ends with your partner’s name, you can remove it. However, once removed, you can’t use that address to sign in to your Microsoft account. You’ll need to sign in using the new primary alias instead.

    Remove alias

    Let me know if you still need more help.

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  2. AI answer

    2026-11-14T01:57:56.53+00:00

    An existing [Email] Microsoft account cannot be added as an alias to the account holding your Microsoft 365 subscription; create a new Outlook.com address from within the subscribed account, make it primary, and only then decide whether to permanently remove address A.

    Change the subscribed account’s primary address

    1. Sign in to the Microsoft account containing the Microsoft 365 subscription using address A.
    2. Open Your info → Manage how you sign in to Microsoft.
    3. Select Add email.
    4. Choose the option to create a new Outlook.com email address and add it as an alias.
      • It must be a new address created here—not existing address B or C.
    5. After it appears under Account aliases, select Make primary beside the new address.
    6. Sign out and test signing in with the new primary address. Confirm that the subscription, OneDrive files, Outlook mailbox, and other account data remain accessible.

    Aliases belong to the same Microsoft account and share its subscriptions, storage, contacts, settings, and password, so making the new alias primary does not create another account or move the subscription.^1^ Microsoft documents creating a new Outlook.com address directly from the account’s Add email option.^2^

    Why address B cannot be used

    Address B is already the username of a separate Microsoft account. Existing @outlook.com, @hotmail.com, @live.com, and @msn.com addresses cannot be attached as aliases to another Microsoft account.[^3^](https://support.microsoft.com/outlook/something-went-wrong-with-error-addriverstoreaccessnonlocalexception ""Something went wrong" with error ADDriverStoreAccessNonLocalException | Microsoft Support")

    There is no supported way to merge the A and B accounts. Closing B first would not release its Outlook.com address for reuse; Microsoft-domain addresses are not recycled this way.^4^

    You can therefore either:

    • Keep B and C as separate accounts while using the newly created alias for the subscribed account; or
    • Continue using B as your everyday mailbox separately, but retain the new alias for signing in to and identifying the subscribed account.

    Before removing address A

    Do not remove A until the new alias works and all account recovery/security information has been reviewed.

    Removing an @outlook.com alias permanently deletes that address; it cannot later be reclaimed or associated with another Microsoft account.^5^

    The safer option is to leave A attached but no longer primary. If you need it completely removed:

    1. Verify the new alias can sign in.
    2. Make the new alias primary.
    3. Update security verification and recovery details as needed.
    4. Update any external services that still use A.
    5. Return to Manage how you sign in to Microsoft and select Remove beside A.

    Removing A will not turn B into an available alias.

    References

    1. Change the email address for your Microsoft account
    2. How to add an email address to your Microsoft account
    3. "Something went wrong" with error ADDriverStoreAccessNonLocalException | Microsoft Support
    4. Adding a newly created outlook.com mail account to my Microsoft 365 subscription as main alias - Microsoft Q&A
    5. Can I change the email address that is connected to my Clipchamp account? | Microsoft Support
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