Hi @Lukas,
Thank you for posting your question in the Microsoft Q&A forum.
I completely understand how challenging it can be when a single email address is associated with multiple Microsoft identities such as personal, work, and guest accounts.
When both business and personal accounts share the same email address, you may see prompts like “Which account do you want to use?”, and sometimes apps default to the wrong identity. While Microsoft does not currently allow merging these accounts, there are ways to manage them more effectively to reduce confusion and improve your sign-in experience.
Here are a few steps that often help:
1/ Rename your Personal Microsoft Account:
- Go to https://account.live.com/names/Manage and sign into your personal account. (This link is for personal account only; you can't sign in with the business one).
- Add a new alias (e.g., a free Outlook.com address or another email not linked to any Microsoft account).
- Make the new alias your primary sign-in and remove the work email from the personal account. This ensures your work email is reserved for business sign-ins.
2/ Use separate profiles or apps
- On Desktop App: The new Microsoft Teams client supports multiple accounts. Click your profile picture > Add another account > Sign in with your business account.
- On browser Profiles: Use Chrome or Edge profiles for different accounts. Each profile keeps its own cookies and sessions, so you can stay signed into multiple accounts simultaneously.
- On Mobile App: Teams mobile supports quick account switching under Settings > Add accounts.
3/ Accept invitations with the correct account:
- Before joining a team or channel, confirm you’re signed into the intended account (business vs. personal). If a partner sends an invite to your personal account by mistake, ask them to resend it to your business account.
4/ Manage guest organizations:
- In Teams, click your profile picture and you can see your accounts being listed there.
- Switch between organizations by clicking on the profile you want easily from the dropdown.
- Adjust notification settings for each org under Settings > Accounts and orgs.
5/ Clear cached credentials if Teams defaults to the wrong account:
You can follow this: Clear the Teams client cache.
For reference:
- Manage accounts and organizations in Microsoft Teams
- Signed in to the wrong account in Microsoft Teams Free
I hope this information is helpful. Please follow these steps and let me know if it works for you. If not, we can work together to resolve this.
Thank you for your patience and your understanding. If you have any questions or need further assistance, please feel free to share them in the comments on this post so I can continue to support you.
I look forward to continuing the conversation.
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