I found this thread which is pretty spot on to my situation but the solution is incomplete: http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/Q_23028099.html?sfQueryTermInfo=1+calendar+connector+exchang
Sembee suggests to, "Remove it using add/remove programs for Exchange." but the problem is that I don't seem to be able to do that. When I set all the options in the MS Exchange Installation Wizard to "Change" the three connectors seem to already not be installed. (See screenshot.)
The calendar connector is, as it seems to be, pointing to an old Exchange 2000 machine that went away long ago. (See screenshot.)
We do not use Novell or Lotus.