Task for mailbox update fails:
Task name Set access options for mailbox 'email@example.com' (id=6283797) Last execution output Provisioning request failed. Error in 'SW Managed Exchange.ModifyMailbox'. Exception calling "Execute" with "3" argument(s): "The operation couldn't be performed because object 'domain.net/Hosting/R0001024472/S001047361/<NAME>' couldn't be found on 'AD01.domain.net'." Error positin: At C:\Program Files\Parallels\Windows Provisioning Engine\Providers\Common\ProviderUtils\ProviderUtils.psm1:53 char:26 + [void]$Context.Execute <<<< ($Provider, $Method, $exec_data) Type: Parallels.Wpe.PowerShell.PowerShellException.
It could happen if tasks to create a mailbox has failed and was cancelled. In result AD object was created but mailbox in Exchange was not. Another reason - AD user or Exchange mailbox was manually removed.
Please, make sure such AD object exists on a preferred Domain Controller (it can be removed or renamed), use ADSIEdit.msc snap-in.
Check mailbox on Exchange server:
C:\Windows\system32>Get-Mailbox -Identity "firstname.lastname@example.org" The operation couldn't be performed because object 'email@example.com' couldn't be found on 'AUSP01MADS08.collaborationhost.net'. + CategoryInfo : NotSpecified: (:) [Get-Mailbox], ManagementObjectNotFoundException + FullyQualifiedErrorId : 8D31F6F8,Microsoft.Exchange.Management.RecipientTasks.GetMailbox
In case if any of them is missing, recreate it manually. If mailbox was manually removed - customer can restore it directly on Exchange if he has a backup.