We are using SP2010 on-premise Enterprise edition. It is a single server containing SQL2008 (not express) and SharePoint
Recently we found the User Profile Service application is not working. In the CA > User Profile Service Application it shows "This User Profile Application's connection is currently not available. The Application Pool or User Profile Service may not have been started. Please contact your administrator"
I clicked on Manage Service Application > select User Profile Service Application > Property. It is using an application pool that not existing in IIS. In the dropdownmenu all the pools' name are not existing in IIS. Check with PowerShell Get-SPServiceApplicationPool, it shows the same pools as dropdownmenu. So I choose to create a new pool. It return success message but in IIS no new pool is create! Also the UPSA still returning the same error.
What could be the problem?