The issue, as explained in detail by Exchange MVP Andrew Higginbotham here, and mentioned by Microsoft in the release notes and a subsequent blog post, is that Exchange Server 2013 will create a new default offline address book for the organization.Any mailbox users who do not have an existing OAB assigned to their mailbox directly, or to the mailbox database that they are located on, will download the entire OAB from the new default OAB that Exchange 2013 creates.
It can be accessed when using a CUMC email account with Outlook and Web Outlook.
Updating the OAB is also possible through the Power Shell console …
via the command As a fallback you can add the Synchronizer users to the addressbook of the Sync User through the OWA (Outlook Web Access).
Hi Valentina, I had tried doing this but did not help. Set it as default OAB and enabled public distribution 2.
I have done following changes by my self and left server one night, today morning I checked it is working, I just need to confirm with users, well thanks for your update 1. Deleted all System health mailboxes and restarted Exchange health services 3.
You can check the OAB configured on mailbox databases with a single Power Shell command.