
One or more OAB files are missing from the client computer.Ī previous full download failed, and Outlook has to start over. The version of the OAB on the server and the client don't match (a more recent version of the OAB is present on the server). There's no OAB on the client computer (for example, this is the first time you've connected to your Exchange Online mailbox in Outlook on this computer). There are situations where Outlook will always perform a full OAB download. The OAB is downloaded and saved on your computer.Ĭonditions that cause a full download of the OAB Depending on what an admin has configured, you might see only one value here (for example, the global address list).Ĭlick OK.

Unchecking this box causes a full download of the OAB.Ĭhoose address book: This drop-down list will display the offline address books that are available to you. On the Offline address book dialog box that's displayed, make the following selections:ĭownload changes since last Send/Receive: By default, this check box is selected.

In Outlook, click File > Account Settings > Download Address Book.

Offline address books are generated every 8 hours.įor more information about address lists in Exchange Online, see Address lists.įor OAB procedures, see Offline address book procedures. Admins can decide which address lists are made available to users who work offline. An offline address book (OAB) is a downloadable address list collection that Outlook users can access while disconnected from Exchange Online.
