java.lang.Exception: Could not connect to the user store. Please check the configuration and try again.
Failed to update identity store. Cannot connect to user store using supplied configuration. Verify the user store configuration is correct and try again.
Unable to connect to the identity store using SSL. ArcGIS Server will revert to using a non-SSL connection to the identity store and credentials will be sent in clear text. In order to use SSL, verify that your identity store has SSL enabled.
I am not sure if the issue is with the Portal or anything is changed from my network side. Another post (Failed to return user store. For input string: "8997:266::8997:266" ) suggested to look for Windows Tunnel Adapter 6TO4 , but I could not find this on my Portal Server.