Microsoft authentication problem: "the change you wanted was rejected"

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Hi!

This errors shows up if (in your case) the LDAP user and the Microsoft user share the same email address.

Check out this solution and let me know if it works for you too:

Microsft365 AD vinculation when users already exist in Zammad

Hello! To solve this I set Automatic account link on initial logon to yes [image] This way if an existing user shares the email address (e.g. from an import and then the system switches to OAuth) it is linked to the existing Zammad account Please verify with your use case if this is what you are looking for in the official documentation here: https://admin-docs.zammad.org/en/latest/settings/security/third-party.html#automatic-account-link-on-initial-logon Best, Skip

Best,
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