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Microsoft Entra Connect sync fails with AttributeValueMustBeUnique error when two or more objects in your on-premises Active Directory share a unique attribute like userPrincipalName or proxyAddresses. The sync
Outlook or Teams shows error AADSTS50076 with message "Due to a configuration change made by your administrator, you must use multi-factor authentication." An MFA policy (Security
Users signing in to Microsoft 365 or Azure services may see "Your sign-in was successful but does not meet the criteria to access this resource" or
Outlook error 0x80040305 occurs when sending email, generating a non-delivery report with "Submit-Message failed" and diagnostic code 0x80040305-0x00000000-0x00000000. Email typically works in Outlook on the web
When a user tries to sign into an Azure-connected application, they get the error: "AADSTS50034: The user account does not exist in the directory. To sign into
You may see "We're sorry, something went wrong... (0x80070005)" or "0x80070005 - Access is denied" when activating Windows or Microsoft 365. This
When signing in to a Microsoft 365 application or Azure service, error AADSTS50064 with the message "CredentialAuthenticationError - The credential used to authenticate with the authentication scheme
Windows auto-enrollment to Intune fails with error 0x8018002B, or the user sees "Something went wrong. Looks like we can't connect to the URL for your organization's MDM terms of use" when joining their device. Event Viewer shows Auto MDM Enroll events with error 0x8018002B
When you see "Account is locked because user tried to sign in too many times with an incorrect user ID or password" (error code AADSTS50053), this
You're seeing "We couldn't sign you in" with error codes CAA20003, CAA20002, or CAA2000B in Outlook, Teams, or other Office apps. This