Outlook is requesting data from Domain Controller instead of Exchange server

15 pts.
Tags:
Domain Controller
Exchange 2003
Global Catalog
Global Catalog on Windows Server 2003
Outlook
Subnetting
Windows Server 2003
Dear Experts, We are running a Domain Controller/Global Catalog on Windows Server 2003 (SP2) and Exchange Server 2003 (SP2) on a Windows Server 2003 (SP2). We have two subnets in our Network, 192.168.0.X and 192.168.6.x. When the users (all running Windows XP SP2) from the subnet 192.168.6.x tries to send mail from there Outlook clients (2003 or 2007) they see a RPC pop-up at the system tray, which indicate that Outlook is trying to retrieve data from the Global Catalog server instead of our Exchange server. And it stays there for about a minute and then only user would be able to send any mail. As far as I understood that the Outlook client is trying to look for GAL while sending sending mail to resolve the recipients name. But why is it taking too long to do that. Thanks, Nikesh
ASKED: March 17, 2009  9:22 PM
UPDATED: March 19, 2009  6:48 PM

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Check your access lists between the two subnets. You need to add SMTP access to your exchange server for the 192.168.6.x subnet.

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  • Nikesh
    Hi Mshen, Thanks for the response! Access lists between the subnets are defined correctly and also 192.168.6.x subnet has SMTP access to the Exchange server Do you know about any setting in the Global Catalog server which can cause this. Thanks, Nikesh
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  • mshen
    No issues concerning the Global Catalog that I know of. It seems more like an access issue. This Link will give you a good list of ports you need to have open between exchange and outlook. Test access by opening a few of the following ports: IMAP 143 IMAPS 465,993,995 POP3 110 SMTP 25 The following UUIDs for Exchange work too:
    1a190310-bb9c-11cd-90f8-00aa00466520
    f5cc5a18-4264-101a-8c59-08002b2f8426      
    f5cc5a7c-4264-101a-8c59-08002b2f8426
    f5cc59b4-4264-101a-8c59-08002b2f8426
    0e4a0156-dd5d-11d2-8c2f-00c04fb6bcde
    1453c42c-0fa6-11d2-a910-00c04f990f3b           
    10f24e8e-0fa6-11d2-a910-00c04f990f3b   
    1544f5e0-613c-11d1-93df-00c04fd7bd09
    9e8ee830-4459-11ce-979b-00aa005ffebe    
    38a94e72-a9bc-11d2-8faf-00c04fa378ff
    99e66040-b032-11d0-97a4-00c04fd6551d
    89742ace-a9ed-11cf-9c0c-08002be7ae86
    a4f1db00-ca47-1067-b31e-00dd010662da
    a4f1db00-ca47-1067-b31f-00dd010662da
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