MyBB Community Forums

Hi
I have some posts from deleted members and seems to posted from guests
How can change the poster name and link them to me (as admin) or other members

That is pretty much standard on most forums that a deleted member's posts appear to be posted by guests. I'm a new Mybb user, so can't say specifically with THIS software, but I know other forum software doesn't allow you to link the posts once a member is deleted