I get the following problem when trying to synchronize Outlook Items

Message is

"Synchronization cannot start because this desktop computer cannot access
necessary information. ..."

I've tried detect and repair but to no avail.

Is it because I have outlook and exchange on the same machine? I know there
were issues in the past do they still exist?

Sorry for the cross post but I am not sure whether the problem is ActiveSync
or Outlook or Exchange.

Thanks for any assistance

Shaun