Currently doing a forest migration from Exchange 2003 to Exchange 2013 (via 2010).
Our set-up is a little different in the fact we use generic accounts for every position in the domain - E.G. the first name is "UK Electrician", with no last name or display name.
The email address on 2003 is currently "email@example.com".
The email address once migrated to 2010/2013 is being set to "firstname.lastname@example.org" and of course, users still on 2003 get an NDR saying this address is not known.
We are struggling to work out an email address policy for this on 2010/2013 that will correct it and give "uk.electrician@...." straight away.....
Can anyone assist with this please?