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I have an account in Microsoft 365 and can easily log in. The problem starts when I want to connect my Microsoft account with Claude. On the login web site I have this information that the account for my domain does not exist and logging is impossible. Please help!
Miscellaneous topics that do not fit into specific categories.
I want you to response not AI assistance. It is unprofessional.
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Hello, Pawel Hammer.
You can connect to Claude only through a Microsoft corporate account. Personal Microsoft accounts are not supported for connection. If you have a problem with your corporate account, contact your organization's System Administrator. He will solve the problem with his admin tools.
Hello @Pawel Hammer
Based on your description, your Microsoft 365 account appears to be working, since you can sign in to Microsoft 365 normally. The failure seems to occur specifically when Claude redirects you to Microsoft for authorization.
The message saying that an account for your domain doesn't exist often means the authentication request is being sent to a Microsoft identity context that doesn't recognize that account.
A couple of things would help narrow this down:
If this is an organizational Microsoft 365 account, another possibility is that Claude's Microsoft 365 integration requires permissions/consent your organization's Microsoft Entra administrator hasn't granted. Microsoft documents that applications can require administrator consent depending on the permissions requested and the tenant's consent policies.
You can also check whether you're signing into the correct Microsoft account by opening Microsoft 365 in an InPrivate/Incognito browser window first, signing in with the intended account, and then attempting the Claude connection again.
I wouldn't change anything in your Microsoft 365 tenant yet. The exact Microsoft sign-in error/error code will tell us whether this is an account/tenant mismatch, application consent issue, or something on the Claude integration side.
Sharing this Microsoft reference as well:
Microsoft – User and admin consent in Microsoft Entra ID
Share the error (with your email/domain and tenant information masked), and we can go from there.
Please "Accept the Answer" if this information helped you. This will help us and others in the community.