Ensure that the following steps are taken to validate the health of the server. Validate that there are no additional unresolved ...

Ensure that the following steps are taken to validate the health of the server.

  1. Validate that there are no additional unresolved alerts for this or other AD FS servers in your farm.
  2. Validate that this is not a transient failure by logging on with a test user from the AD FS login page available at https://{your_adfs_server_name}/adfs/ls/idpinitiatedsignon.aspx
  3. Go to https://testconnectivity.microsoft.com and choose the ‘Office 365' tab. Perform the ‘Office 365 Single Sign-On Test'.
  4. Verify if the your AD FS service name can be resolved from this server by executing the following command from a command prompt on this server. nslookup https://{your_adfs_server_name}

If the service name cannot be resolved, please refer to the FAQ section for instructions of adding a HOST file entry of your AD FS service with the IP address of this server. This will allow the synthetic transaction module running on this server to request a token

If the problem is recurring on this server, please contact Microsoft Support for further assistance.