LicenseServiceNonTransientException: Service resource is gone. Exception details : Status code returned: ‘Gone’, HTTP request error: Unknown, Message: Gone – error returned. Response body: “[AuthenticationHandler.AcquireTokenSilentWithLoginHintAsync with certificate] threw MsalClaimsChallengeException with errorCode: invalid_grant, correlationId: xxxxxxxxx, details: AADSTS50158: External security challenge not satisfied. User will be redirected to another page or authentication provider to satisfy additional authentication challenges. Trace ID: xxxxxxx Correlation ID: xxxxxxxxxx Timestamp: xxxxxxxxx The returned error contains a claims challenge. For additional info on how to handle claims related to multifactor authentication, Conditional Access, and incremental consent, see https://aka.ms/msal-conditional-access-claims. If you are using the On-Behalf-Of flow, see https://aka.ms/msal-conditional-access-claims-obo for details.”.

Remove https://docs.azure.cn/en-us/entra/identity/conditional-access/concept-token-protection

Check Azure AD Conditional Access settings and either adjust the policy or exclude Business Central from it.

Please follow the steps provided below:

– Explicitly sign out of business central (not just closing the browser window)

– Clearing all cookies, closing all browser windows.
– Sign in again, which should prompt for MFA.
– You can also try using a private browser session.