We have a very odd problem, which is beginning to drag on a bit now. We have a client who has a number of Servers (Windows 2008 family mainly). We have recently moved them from Windows 2003/Exchange 2003 to Windows 2008 running Exchange 2010, this is fine and there appears to be no issue with the configuration as far as we can see.
However, the Exchange server is held in the cloud, with the site offices and servers all connecting into this via private WAN links (could be relevent?).
What we're finding is, that when the IT Department add user accounts through AD (servers in one of the branch offices) it takes almost exactly 30mins for the Exchange server to see the User Account, to allow a mailbox to be setup and bound to the user account.
The reason for not adding the user account and mailbox directly in Exchange 2010, is because of the OU layouts - it's easier for the IT Department to setup the user account in AD first and then go and find the user account to link a mailbox to.
The 30 minute delay also seems to affect the workstations, when setting up Outlook profiles for the new account. Again, we have to wait 30 mins after the mailbox is added for the workstations to see the account.
The branch offices all have Domain Controllers in their sites, so the sync times could be something to do with delays in the sites updating their information to and from the Exchange Server and DC in the cloud?
Thanks in advance.