Removing child domain

hi

i looking advice best way tackle problem.

at moment have active directory forest 1 parent , 1 child domain. there 1 domain controller in child domain. domain controller has exchange server 2007 installed receives email different smtp domain exchange server in our parent domain runs exchange server 2003. both exchange servers able send email each other no problem.

the plan have site child domain , exchange server part of our head office setup. want remove child domain , have of our other remote sites i.e. ad site part of the parent domain. in regards exchange want become addtional exchange server within our existing exchange organisation can move mailboxes between 2 servers depending users located.

if remove child domain deletes user accounts within doesnt it?

the best way can think is:
1. backup users in child domains files , email mailboxes
2. run dcpromo on child domain controller demote server , remove child domain
3. un-install , remove exchange server 2007 organisation
3. reinstall server os , promote domain controller new site
4. reinstall exchange server existing organisation
5. re-create user accounts , mailboxes
6. restore files , emails new mailboxes

can think of better way of doing this? in particular hoping wont have remove , re-install exchange, no problem re-create user accounts , re-attach mailbox there 40-50 users.

thanks 

hello,
you can use active directory migration tool (admt) migrate user , computer accounts parent domain.  exchange, may have migrate mailboxes..
see thread: http://social.technet.microsoft.com/forums/en/exchangesvrmigration/thread/5c3ba94b-7154-4b8a-bc49-9a98950f7a75

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isaac oben mcitp:ea, mcse

Windows Server  >  Directory Services