Send on behalf permission is a useful tool. FocalScope allows to send on someone's behalf,but not as a permission like Outlook has. In order to do this you can do the following:.

Drag the email you want to respond on behalf of someone from his Incoming folder the your Incoming folder:

Figure 2 - Email dragged in the Mihai 1's Incoming Folder

In order to be able to do this operation you need to have access to the View of the Agent you need to respond on his behalf and access to the folder you drag the folder to. You can read more about having access to an Agent View in focalscope on AA-00346/0/How-to-use-Agent-Views-to-grant-supervisors-access-to-agents-personal-folders

Figure 3 - Test User has access to Mihai 1's View