last night I upgraded our Exchange 2010 server to SP1. Since then the Exchange 2010 mailboxes get empty GAL's. We have a coexistence in our Exchange farm, there are a few Exchange 2003 servers.
So the legacy users (mailboxes on the Exchange 2003 server) get the correct GAL.
This error I found in the Event Viewer:
Process Microsoft.Exchange.AddressBook.Service.exe (PID=2788). Coudn't find a global address list for user '(null)' (SID='S-1-5-21-353336168-582209970-19082705-2111')
Please help us out, as the users can't access the GAL, but more importantly their BlackBerry's aren't working...