I just picked up a client with a single domain controller 2003 standard server with Exchange and 11 workstations. I noticed the internal domain name was ABCDF.org the same as their external website domain name. The previous IT person just added an "A" record with "www" to internal DNS to allow internal domain users to view the external website .
They now want to move to SBS 2011. My goal is to possibly change the internal domain to ".local" on the existing domain prior to to the actual migration to SBS 2011.
1. Can i leave the internal domain name as is and proceed with the migration?