EmailMerge365 supports both Send As and Send on Behalf delegation models in Microsoft 365.
The behavior depends on the permission assigned to the user in the Microsoft 365 Admin Center / Exchange Admin Center, and the application automatically handles both scenarios correctly.
Settings users need to change in Admin Center
If given Send on Behalf permission
Grant the user/delegate access under:
- Mailbox Delegation → Send on Behalf
Result:
If given Send As permission
Grant the user/delegate access under:
- Mailbox Delegation → Send As
EmailMerge365 automatically detects and works with whichever permission model is configured by the administrator.
Article ID: 407, Created: 5/19/2026 at 8:07 PM, Modified: 5/19/2026 at 8:07 PM