To identify the causes of impersonation issues:
For example:
EP0060E: Unable to retrieve identity for user ID {0}. Request for transaction {1} on session {2} terminated.
where: {0} = user ID; {1} = transaction name; {2} = session ID
EM0020E Protocol-transition token creation requires a Windows 2003 or later domain. SEE Monitor configuration specifies impersonation using protocol-transition mode with local user authentication, which will not work.