I'm trying to setup a new user account in AD on my Exchange 2003 server. When I try to create the Exhange mailbox, the mailbox store dropdown box is completely empty. However, the store is online and functioning as we're all sending and receiving emails. This is a new problem; I haven't run any updates since the last time I created a mailbox and now. Not sure what's going on. I've attached a screenshot of the issue. Any assistance would be greatly appreciated as I'm beginning to freak out slightly.