So right now pretty much all of our staff are used to logging on as DOMAIN\First Last.
Their UPN names are "first email@example.com" with the UPN suffix being our external FQDN as we use split DNS.
I'd like to update peoples UPN names to match their email address.
Firstly, does anyone know a way to automate/script this? I thought ADModify might do it but it doesn't seem to.
Secondly, are there likely to be any dark dire implications in doing this?
I can't think of any because as I said, nobody even knows what their UPN name is, but that doesn't mean there isn't something I've overlooked that'll bite me on the ass :)