We have recently migrated from Exchange 2003 to Exchange 2010 and also gracefully removed Exchange 2003 servers from the organization and now we are starting migration to exchange 2013 but previous Administrative group (legacy exchange 2003) is still present which is also referred in LegacyExchangeDN attribute of users.
I have following queries;
Can we remove Previous Administrative Group and change the legacyExchangeDN on all exchange objects?, If we leave it as is, will it affect any thing ? specially while installing and migrating to exchanged 2013, we are now starting to upgrade our Exchange from 2010 to 2013 as per the plan.
