Default offline address list exchange 2016 not updating
If your account is less than 24 hours old, the Exchange server will not have generated the Offline Address Book yet.
The Offline Address Book is generated every morning by AM PST.
Run the following command to move the mailboxes to a database on your Exchange 2016 server: For each message that is sent to a distribution group, Exchange must access the full membership list to route the message to all recipients.
Expansion servers route messages that are sent to a single distribution list or group for each of the recipient objects in that list or group.
The following article is a concentrated and (hopefully) comprehensive set of information collected from various sources.
They need to be hosted on the highest version of Exchange in the organization.
The mailboxes themselves are typically quite small and will move fairly quickly.
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