All our users use the Room Finder feature in Outlook 2010 (Exchange 2010). Since last Thursday (19.11.2015) the room finder dropdown list disappear for users usinf on of our 3 Exchange CAS. It happened after they downloaded updated GAL.
If we delete user profile, it is OK. However, deleting of user profile is not a solution for us because we are talking about more than 3000 users. Also as we use cache mode, we don't want to replicate again entire mailboxes. And at last we don't want to loose settings and documents other than Outlook.
We suspect that there is some cache or something, but we don't know where to look.