I've got Exchange Server 2013 that is just on the SP1 with the build number Standard Version 15.0 (Build 847.32)
When I execute the below script to modify the sent items
to be copied in the mailbox, using the script:
Get-Mailbox HelpDesk | Set-Mailbox -MessageCopyForSentAsEnabled $true -MessageCopyForSendOnBehalfEnabled $true
I got this error message:
MessageCopyForSentAsEnabled can only be set on shared mailboxes
From the Powershell result of this mailbox properties, I can see:
IsShared : False
So what can I do to make that Powershell run with no issue ?
Is it possible to change the mailbox type to Shared mailbox without causing the user to lose access or any outage ?
Do I need to modify the user Registry for anyone using the Shared mailbox now ?
Note: The current mailbox "Helpdesk" is working fine (all of my IT team are assigned Full Access Permission in the Delegation tab) until I found out the strange behaviour today.