'Computer is not a domain member, or domain controller not available (1753)' may be refering to replication error 1753 'There are no more endpoints available from the endpoint mapper'.
To fix Agent fails to start with 'Foreign root domain not set'
Check the registry for the presence of the registry key:
HKEY_LOCAL_MACHINE\Software\Microsoft\Rpc\Internet\
This registry key is intended to restrict the dynamic allocation of RPC ports. the key can be used to manage the number of RPC ports being made available to the server. The minimum number of ports required may differ from computer to computer. Computers with higher traffic may run into a port exhaustion situation if the RPC dynamic ports are restricted. Take this into consideration when restricting the port range.
See : http://support.microsoft.com/kb/154596" for more details about the registry key and options available.
