[ActiveDir] Empty Group Lists

[Diel,Nick \(Work\)]

I am new to this list and have a problem hopefully someone can help me out with.  In several of my groups (both security and distribution, all universal) the Members section is blank.  There are still members in them, but I just can’t see the members.  The distribution and security groups still work and what not.  The list is blank on both DCs (one is an exchange server), also blank on my local MMC (have AdminPak), and blank when looking at the groups through Outlook.  These groups are roughly my largest groups (some will have 50+, while others not as many).   Any help would be great, Nick