I recently spoke with a client who was trying to set-up a sync between her program and a SFDC campaign. The error she received stated that the SFDC was already syncing to a Marketo program so she could not do it. There was clearly an error - but in order to determine which Program WAS syncing and break that sync, we had to go hunting through many campaigns.
It would be great if we could simply be told, in the same error pop-up, which program was syncing to SFDC so that we could disable it on the spot instead of needing to go hunting.