I just added a user to one of my user groups. But it seems this user must have already had an account, since instead of sending an invitation email, the user's name appeared in the group, but with a DEACTIVATED tag.
If he does have an existing account, I would like to reactivate it, but the user does not appear in the User Directory or anywhere else I can see.
How can I reactivate the account, or even delete it and send another invitation?