Download Offline Address Book – Unexpected Error has occurred

0x80190194 – Task ‘user@domain.com’ reported error (0x80190194) : ‘An expected error has occurred.’

Open Exchange Management Console and execute below command.

Get-OfflineAddressBook  Where {$_.ExchangeVersion.ExchangeBuild.Major -Eq 15}  Set-OfflineAddressBook -GlobalWebDistributionEnabled $True -VirtualDirectories $Null

execute below command to reset IIS and try to download the Offline Address Book.