"Invalid Outgoing delivery method - The outgoing delivery method for a forward mailbox can only be set to None."
This error is encountered when we select 'outgoing mail' as Server Side Synchronization in mailbox while email configuration. Checked online but couldn't find the reason why should the outgoing delivery method for a forward mailbox be only set to None and how to configure a forward mailbox. Kindly share if someone ever encountered this error and could resolve it.