For sure I'm surprised ServiceDesk doesn't sync users from the CMDB. Especially considering that most of us have tweaked out the Active Directory connector within the NS already to grab what we need. Having ServiceDesk talk directly to AD doesn't seem like the best plan.
Let the NS do the AD sync (because it's better at it, anyway, and we have lots more options), pull what we want into the CMDB, then have ServiceDesk get it's data from the CMDB.
How confusing will this be once we do personality transplants or other user-based tasks in the new NS7? If we have a servicedesk ticket for user-related NS procedures, the ticket is going to be tied to the SD contact, right? But the task will need to be launched from the NS using the CMDB contact. This could get confusing.
I hope Symantec comes up with a solution that does not involve purchasing the full Workflow. There's no way I can get another $50k approved to my budget.