Offline address book exchange 2016 not updating

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Over 14 years of experience with Microsoft systems administration, IT operations, and helpdesk management.

They were updating phone numbers for user accounts in their on-premises Active Directory and noticing that the Outlook offline address book (OAB) was not reflecting these changes even after waiting the requisite 24 to 48 hour period in which changes and updates should be showing.

What we found was an incorrect DNS record for autodiscover.

OALGen detected that the file ‘…..lzx’ is corruptedor missing. Restorefiles in this folder from the recent backup or clean up folder contentand force a full OAB generation.

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At the time of writing, Microsoft have not yet updated the Exchange Deployment Assistant with instructions to migrate from Exchange 2013 to 2016 however there have been numerous blogs released about CAS coexistence which have helped write this article.To create mailbox use command WARNING: A script or application on the FRONTEND1. Now I have tested if OAB change is reflected in client computer (should not be) And now I have downloaded new OAB to client and tested again One registry key setting and Outlook client will work online from Addres book point of view, BUT!This setting also requires to clean up OAB files from client computer to behave correctly.Specialties: Office 365, Lync, Windows Intune, Windows Server 2003/2008/2012, WSUS, Backup Exec, Microsoft Distributed File System and Namespace.In this multi-part series, we’ll cover how to upgrade from Exchange 2013 to Exchange 2016.Change in OAB is not visible immediately, because we have OAB files on the client computer and Outlook use those! OAB is not updated anymore even you download files successfully from Exchange.In this stage Outlook is stuck somewhere between mode 0 and 1 and updates are not received by client.Microsoft has a good support article for troubleshooting the OAB in an Office 365 environment located here.Of particular interest is section 6 on testing the autodiscover service: “Step 6: Determine whether the autodiscover service is working, and check access to the Offline Address Book Note: If the Offline Address Book issue wasn’t resolved by using steps 1 through 5, follow this step for validation before you call Support.Check whether Outlook and the computer can access the Offline Address Book file on the server.This action is typically done by Outlook in the background or when you force a download of the Offline Address Book in Outlook.

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