For the hosted exchange module (2013). When the memberof tab is selected if the organization has a lot of distribution lists. The result of the MemberOf takes an extremely long time to load.

As a test I created an organization with 8 users, and 100 distribution lists. I added all of the members to each distribution list.

If I select the MemberOf tab under either the user or the mailbox it takes 2.6 minutes to return a result. Looking at the logs it appears that its checking every distribution list to see if the user is a member or not.


Is this intended or a bug? Wouldn’t the AD MemberOf property to make this return a quicker result?