Hi all There is a merger of two different companies, with different domains for E.g. ABC.COM and XYZ.COM respectively. They both have differernt E-mail servers also. After merger they'll be one company. The requirement is to make it a single domain How do we go about merging the Windows 2000 with Active Directory services both side, Exchange server 5.5 both the sides. regards Sanjay choudhary