Hi @Dmitriy Laktyushin,
Thank you for reaching out to Microsoft Q&A Forum.
Regarding the issue you’re experiencing with the greyed-out account in the Authenticator app — to help you resolve it, we’d recommend the following steps depending on your setup:
If this is the only account in your Authenticator app, please make sure you’ve added an alternative sign-in method (like phone or SMS). If that’s in place and you can still sign in, just uninstall and reinstall the app — the account should disappear.
If you have multiple accounts in the app, please ask your admin to reset MFA. After that:
- Sign in at https://myaccount.microsoft.com
- Go to Security info
- Remove the old Authenticator method
- Then check again in the app — it should now let you delete the account
If the issue persists after trying all the steps above, we recommend raising a support ticket via the Microsoft 365 admin center. The support team can further investigate and escalate the case to a specialized team if needed.
Reference: Get support - Microsoft 365 admin | Microsoft Learn
If you need further assistance, please let us know.
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