Good evening hive mind
Ok here's my environment
onsite email - non exchange, non AD integrated solution
UPN's are all like Jon-Doe@contoso.local with pre-windows 2000 they are contoso\Jon-Doe
email addresses are like email@example.com or firstname.lastname@example.org across multiple domains
all client machines are Win 7 with 2008 R2 AD and several Win 2008 R2 member servers running on VM
I have approx 6 top level domains and have added these to the UPN suffixes but I'm a little worried as to whether I should just change the UPN's to the actual email address, so Jon-Doe@contoso.local will become Jon.Doe@contoso.com and then leave the pre-windows 2000 UPN as is, contoso\Jon-Doe, but I'm worried what effect that will have on users logging onto their machines/resources
Is my plan good, bad, terrible or what should I do?