Hello all,
I find there is a strange security principal in my exchange 2010 server.
when I click "manage full access permission" of one mailbox, there is a account- "S-1-5-21-2214493178-4142822614-4081457058-1110", I don't know why it is there, what the account is?
Can I delete it?
My exchange 2010 is upgraded from exchange 2003...
Regards