I have two requesters in a different department that I wish to make agents. Since their email addresses are already in use, I can't merely add them as new agents.
Hope you are doing well.
Can you please try converting them as Agents from their requester Profiles? Please navigate to Admin->Requesters->Edit the requester profile of those requesters and there you'll see an option called "Convert to an Agent", Click on the option and you can either make them as Full Time or Occasional agent.
Let me know if you face errors during the conversion.
I am trying to convert Requester to Agent and I don't seem to have that option "Convert to an Agent" on the Requester profile page.