I have Installed OCS 2007 STD & Exchange Server in SERVER1 In Microsoft VPC till yesterday i was able to access, chat, through IM Office communicator, enabling Loop back Adapter...
Now today i disabled loopback tried to plugged N/W cable joined a new OCS Client to the OCS2007.COM, While login choose OCS2007 with the appropriate credentials, mean time should shown Installing Microsoft Office Communication Server 2007, while loging on but unfortunately not...
Second thing is gives me an error "cannot sign in the server is unavailable. if the problem persists,Contact your Administrator" while login through O communicator 2007,