Default global address list exchange 2016 not updating
Because the files were not changed recently the error message was downloaded and the client could not download the files.
To summarize – we have an OAB that is not updating and clients that cannot update their local copies because the copies are too old.
However if you dig a little deeper in the Exchange Management Shell you can see the problem: As you can see the Is Default Global Address List attribute is set to false.We tried to fix this copy and were unable to do so with a reseed or a resume.So we decided to remove the copy and then create a new database copy. With a single, good database copy, we can now generate, update and download the Offline Address Book.Unfortunately this is not as simple to fix as just running Set-Global Address List, as there is no argument for that cmdlet to change that attribute. Launch and connect to the Configuration naming context.Navigate to the Default Global Address List object. You may need to wait a short time for Active Directory to replicate the change.