Exchange does notuse GC on additional controllers of the domain. Event id:2080 Source: MSExchange ADAccess Process MSEXCHANGEADTOPOLOGYSERVICE.EXE (PID=4128). Exchange Active Directory Provider has discovered the following servers with the following characteristics: (Server name | Roles | Enabled | Reachability | Synchronized | GC capable | PDC | SACL right | Critical Data | Netlogon | OS Version) In-site: eldin-new.some.org CDG 1 7 7 1 0 1 1 7 1 eldin-dc1.some.org CD- 1 6 7 0 0 1 1 7 1 eldin-dc2.some.org CD- 1 6 7 0 0 1 1 7 1 Out-of-site: For more information, see Help and Support Center at BUTat the same time: C:\>dsquery server -forest -isgc"CN=ELDIN-NEW,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=some,DC=org""CN=ELDIN-DC1,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=some,DC=org""CN=ELDIN-DC2,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=some,DC=org" How to force Exchnage to see all 3 GC?

Viras, Check the following KB articlethat one describes how you can manually add the GC, maybe it's an option for you to do that. Else switch of automaticly discover the GC and then switch it on again. Johan

4th option is Reachability & values are below. eldin-new.some.org CDG 1 7 7 1 0 1 1 7 1 eldin-dc1.some.org CD- 1 6 7 0 0 1 1 7 1 eldin-dc2.some.org CD- 1 6 7 0 0 1 1 7 1 where 1 = Global Catalog is reachable through port 3268, 2 = DC reachable through port 389, 4 = Configuration DC reachable through port 389 and we have to add all these values. for eldin-new.some.org = 7 (that means 1+2+4, GC +DC+cDC) for eldin-dc1.some.org = 6 (that means 2+4, DC+cDC) for eldin-dc1.some.org = 6 (that means 2+4, DC+cDC) So it looks to me thatport 3268 is blocked between GCs & Exchange server, so check it, probably you can use portquery or some other utility.

YEEESSS Thanks!