Not sure if this is normal but I have a Distribution List with all employees and it contains just under 2800 mailboxes. When I am going to add a user to this list using the Exchange Console, it takes about almost 3 minutes to enuerate the list. You can't do anything with it until this is done. I thought maybe the first time it would take a while and then subsequent times it would speed up but not the case.
Every time I click on the Members tab it takes almost 3 minutes to enumerate all the users. 2800 is not a lot so I can't image a list of 10,000 and how long that would take. Other smaller DL's of course have no issue. Just want to know if this is normal. There are no warnings or errors in the Event Log. Running Exchange 2010 SP3 RU1. We have plenty of local DC's running 2008 R2 x64. Just didn't know if this is an Exchange thing. I thought it was too long.