Last week we added a new conference room in Exchange.When I look up the conference room in the Global Address List, it doesn't show up. So as I understood from our Sys Admin, the oab files are generated on one server, and rely on the file replication service on the global catalog servers (we have 2 of them) to copy the oab files to each of the servers.
For IMAP, POP3, and other types of email accounts, it is usually an Outlook Address Book.
You can change the default Address Book and set other address book preferences, such as which address book to check first when sending a message, and where to store personal addresses.
If you use Outlook with an Exchange Server account, your address book list will include the Global Address List (GAL).
The GAL contains the names and email addresses of everyone that has an account with that Exchange Server and is configured automatically by Exchange.
However, if I delete my files (Offline Address Book) then I can see the new conference room in the Global Address List. The service was not started on one of the servers and therefore some users were getting old oab's while other users were getting fresh copies. if you're having this issue, make sure the file replication service is started. Chances are good that OAB generation is failing for some reason.
When I download the Offline Address Book again, the problem returns. This does show up in the event-logs of the Mailbox server that does OAB generation, but the logging generally isn't turned on high enough to tell you I've had this problem before - not for Exchange 2010 I will admit (it was Exchange 2003) but the symptoms were exactly the same, so with a bit of luck so is the solution.
This appears at the bottom of an email message (see figure 1 below).
Figure 1 – Outlook Social Connector (OSC) If you click on the OSC you can their picture and a summarized view of recent conversations you have had with that person.
You are unable to see his information in your address book.