Send Permissions
To manage Send on Behalf and Send As permissions on a Public Folder navigate to the following path:
Click Manage from Options in front of Exchange account and select Public Folders tab. Click on a existing Public Folder name or create new. Click on the Permissions tab.
- Send On Behalf: Select mailboxes/contacts/groups to Send on behalf and Save.
- Send As: Select mailboxes/contacts/groups to Send As and Save.