- Saving Sent Items can be on Shared Mailboxes Only (Converting Mailbox to Shared to Set-Mailbox MailboxName –Type Shared)
Get-Mailbox test2016-4 | Set-Mailbox -MessageCopyForSendOnBehalfEnabled:$true -MessageCopyForSentAsEnabled:$true
User1 do SendAs on Test2016-4 Mailbox
Now in Test2016-4Â Sent Items you can see Items being saved. Which is not by default.
Enabling From in Outlook Web Access After Applying SendAs Permission in Shared mailbox delegation properties.
From –
Send As is Saved to SharedMailbox