We have an Active Directory 2003 forest root domain XYZ.COM with two child domains A.XYZ.COM and B.XYZ.COM our email environment is Notes 8.5
The business is splitting into two independence entity due to take-over. We are now planning to create two new Greenfield Windows 2008 Active Directory Domains A.Com and B.COM and migrate A.XYZ.COM and B.XYZ.COM
Can you please advice the best approach / tools / method for the migration? Are there risks I need to bear in mind (DNS Trusts, etc)? Can I have a mixture of 32bit / 64bit Domain Controllers in the two new Domains / what are the benefits?