Hi, I have windows 2003 server on which active directory is configured. Previously I was having active directory on windows 2000 server. What I did , I had configured Additional Domain controller named as backup. Later I changed all the role of that server from active directory. Then I had upgraded that machine to windows 2003 domain controller. Now the problem is that when I start the migration process of exchange 2003 it give me error that no Global Catalog Server could be contacted. It gives the error in 3 step of phase-I of exchange migration. It shows the machine as domain controller Please help, how can I make my domain controller to work as a global catalog server. Regards Amit Kapoor Network Engineer Module One India Ltd. Paharpur Software Technology Incubator Park A-88, Okhla Phase II, New Delhi 110020, India Tel: +91-(0)11-41859200 | Fax: +91-(0)11-41859220 E-mail: amit@xxxxxxxxxxxxx | Web: <file:///C:\Documents%20and%20Settings\amit.LOGIN\Application%20Data\Microso ft\Signatures\www.moduleone.com> www.moduleone.com ==== c r e a t i v e i n t e r n e t s o l u t i o n s ==== Module One, one of India's leading interactive agencies, uses a combination of creative, marketing and technology skills to assist clients in successfully using the Internet for their marketing initiatives. <http://258815.sigclick.mailinfo.com/sigclick/0A040E09/01074C05/0E4D04181610 20.jpg>