Forum Discussion
Send on Behalf not working in specific situation
In the second scenario, Outlook is effectively using Send As permissions, so just add those and be done with it 🙂 If you insist on using Send on behalf of, you need to make sure to always select the "send using" dropdown, as detailed in the article linked above.
Remco_Tiel Hi, you're doing it manually? You really benefit by using PowerShell
https://docs.microsoft.com/en-us/powershell/module/exchange/add-mailboxpermission?view=exchange-ps with the -AutoMapping switch.
To answer your question https://docs.microsoft.com/en-us/exchange/collaboration/shared-mailboxes/shared-mailboxes?view=exchserver-2019#what-are-shared-mailboxes
To control cache of shared mail folders
Thnx for your reply. I've tested the automapping, which works, however automapping is adding the shared mailbox to your own profile (pst) instead of creating a seperat pst file.
Remco_Tiel You mean the .ost I assume. You can use the registry setting if applicable.
I found these on the topic
https://www.techpros.com.au/office-365-automapping-performance-issues/
