I can receive files and emails for remote assistance requests from workstations (xp sp3 and W7 64bit) in the domain to my windows 7 (ultimate, 64bit) PC.
The Administrator profile on the server can also use these profiles, to administer requests for remote assistance.
However, I cannot on the Windows 7, XP or SBS2008 server instigate an unsolicited offer of remote assistance to a user.
I have checked a variety of settings in GPO's, Goggled and the error given on failure of offering a remote assistance is event log 9, source Remote Assistance.
with the explanation "There was a problem interacting with COM object 833E4010-AFF7-4AC3-AAC2-9F24C1457BCE. An outdated version might be installed, or the component might not be installed at all."
RDP works fine.