In a word: probably. I would, in general, recommend all your DCs be GCs. Exchange uses DC's for 3 different things (a GC for addresses, a DC for authentication, and a DC for LDAP lookups in the configuration container). It prefers to choose a different one for each (based on some restrictions). As long as Exchange isn't installed on a DC, it will fail over automatically (it takes about 15 minutes, but it'll happen) to another server that meets its requirements. -----Original Message----- From: Chris Chauv [mailto:chrisc@xxxxxxxxxxxxxxxxxxxxx] Sent: Tuesday, January 18, 2005 2:16 PM To: [ExchangeList] Subject: [exchangelist] RE: Exchange communicating w/ another DC.. http://www.MSExchange.org/ Michael, Is that all it needs....contact w/ a Global Catalog server? So, then it would be OK if I configure the second DC to also be a Global Catalog server...correct? Thanks. chris -----Original Message----- From: Michael B. Smith [mailto:michael@xxxxxxxxxx] Sent: Tuesday, January 18, 2005 10:36 AM To: [ExchangeList] Subject: [exchangelist] RE: Exchange communicating w/ another DC.. http://www.MSExchange.org/ In a word: no. Exchange requires a GC. If it can't find one, it'll basically hang. For a technical description of what happens, see the "Exchange Technical Reference Guide", I think around page 49 or 50. -----Original Message----- From: Chris Chauv [mailto:chrisc@xxxxxxxxxxxxxxxxxxxxx] Sent: Tuesday, January 18, 2005 1:26 PM To: [ExchangeList] Subject: [exchangelist] Exchange communicating w/ another DC.. http://www.MSExchange.org/ Hi All, I just built another Domain Controller in our network. What I want to know is, once replication of AD data is completed...can the Exchange server communicate w/ the new DC if I shutdown the original without transferring any of the AD roles or making the new DC a Global Catalog server.... Thanks, chris ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: World of Windows Networking: http://www.windowsnetworking.com Leading Network Software Directory: http://www.serverfiles.com No.1 ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this MSEXchange.org Discussion List as: michael@xxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: World of Windows Networking: http://www.windowsnetworking.com Leading Network Software Directory: http://www.serverfiles.com No.1 ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this MSEXchange.org Discussion List as: chrisc@xxxxxxxxxxxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: World of Windows Networking: http://www.windowsnetworking.com Leading Network Software Directory: http://www.serverfiles.com No.1 ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this MSEXchange.org Discussion List as: michael@xxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx