Problem Adding Exchange 2007 CAS on 2003 server with 2008 dc's
Posted on 2009-03-29
I have a working production environment with Windows 2008 DC's, Exchange 2007 servers also on 2008 Servers. I'm wanting to add another CAS server to try to help with an OWA problem, where I suspect IIS7 as being an issue. I'm trying to install this CAS on a new Windows 2003 server so I can use IIS6. The server is 2k3 R2 Enterprise x64, sp2. As far as I know, I have met all of the prereqs. During the install process, I get to the point where I choose to install the CAS role, then I get this error: "cannot find at least one global catalog server running windows server 2003 service pack 1 or later in the local active directory site." My DC's are all GC's as well, I've verified in ADS&S and also in DNS. 2 of them are in the site where this new CAS box is, and the subnet is defined in ADS&S as being the same site. My other existing Exchange boxes are in the same subnet and are working fine. I've tried installing via the gui and also via command line, specifying the DC to use, but it still can't find a gc. I know they're there, why can't I see them? My dc's are 2008, do I really have to have a 2003 box as dc also? That doesn't make sense...
Thanks in advance for your help!