Are you running the server as a Windows system service?
If so, you cannot use drive letters, because the login script which applies the letters to network shares doesn’t run for a service. You’ll need to convert to UNC paths.
Are you running the server as a Windows system service?
If so, you cannot use drive letters, because the login script which applies the letters to network shares doesn’t run for a service. You’ll need to convert to UNC paths.