Troubleshooting Microsoft 365 problems

The remote server returned an error: (401) Unauthorized

Cause: This issue is caused when the certificate is not uploaded to the Azure portal.


  • Log in to the Azure AD portal.
  • Click Azure Active Directory from the left pane.
  • Choose App registration under the Manage section.
  • Select All applications.
  • Click on the application which is configured in RecoveryManager Plus
  • Click Certificates & secrets from the left pane.
  • In the Certificates section, click Upload certificate and upload the CER file of the certificate which you had applied in RecoveryManager Plus when configuring the tenant.
  • If the issue still persists, contact

The request failed with HTTP status 403

Cause: This issue occurs when the necessary API permissions were not provided for the application.


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