Thanks for the feedback Tom.
Having not used the netapp's quota functionality, I'm assuming I'd setup quota's by each group, so that Ops could have 500 GB, Engineering 1 TB, Maintenance 200 GB, etc and if a single group hit the limit they would be stopped from consuming any more space, and not impact the other groups. The quota would use the Active Directory groups, or would I have to set up groups within the NetApp itself? What about shares that have a couple different AD groups using them?
Quota's have always been a sore spot with Management here, typically they buy into it until the first time a hard limit is reached and then they panic and insist the quota's be turned off rather than having the group do some cleaning.