To get around the problem with large MailTo: links not working either at all on the Mac client (cut and paste doesn't work very well and is a poor answer to the problem), or consistently on any client, we have setup a group for each class at the school, this equates to over 1300 groups. These groups have been created in their own container, whereas the students are in their own container under their respective campus (3 campus K-12 school)

These class groups now need to be associated with a Post Office, due to the large number of groups, would you recommend creating a post office just for these groups, or just associate them with the relevant campuses student post office?

Thanks in advance

P.S: This is hopefully going to slow down the push to move to Exchange as our Mac users see this problem the most.