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

2023年9月18日 · There are two ways to open the OAB from within Outlook. The first is by clicking on the TO / CC / BCC button in any Outlook email message whether creating a new message or replying to a message. What you will be presented with is something similar to. In some cases, there are no contacts displayed from the selected default folder.

2023年2月21日 · An offline address book (OAB) is a local copy of an address list collection. OABs are used for address book queries by Outlook clients that are configured in cached Exchange mode.

2021年6月22日 · Note: The Offline Address Book is also often referred to as the OAB, Offline Global Address List or GAL. Finding the location of the OAB files. The default location where Outlook stores the oab-files is; C:\Users\%username%\AppData\Local\Microsoft\Outlook\Offline Address …

When you are running in cached mode, your Exchange mailbox is synchronized to a local file (an .ost file), and the offline address list from your Exchange computer is synchronized to a collection of files (.oab files) on your client computer.

2019年11月25日 · In this article, we will dig a little deeper in to the OAB generation process, the files that are involved, what happens in case of a failover, and how that was linked to this specific scenario (Or was it? Read on to find out!)

2021年5月11日 · Are you troubleshooting an Offline Address Book issue? Knowing how the timings work in Outlook and Exchange and how to trigger a manual update and download of the OAB-files can help you solve it more quickly.

2023年2月21日 · An offline address book (OAB) in Exchange Server allows Outlook users in cached Exchange mode to access address list and global address list information while they're disconnected from the server. For more information, see Offline address books in …

2024年10月30日 · An OAB file is an offline address book created by Microsoft Outlook to store contact information for offline access when disconnected from Exchange Online. It contains a directory of names, email addresses, and other contact details for users within an organization synced from Exchange Online.

The oab utility and library decode Microsoft Exchange/Outlook Offline Address Book (.oab) files, and provide their contents as a Python dictionary or in CSV (delimiter separated values), Excel, JSON, text or tabular formats.