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problem with owa and Exchange 2008


I am having a problem where i cant connect to OWA anymore on my SBS server 2008.

It keeps giving me the following error in the eventvwr

The Exchange Topology service on server localhost did not return a suitable domain controller.

Any ideas?
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1 Solution
Dash AmrSenior Specialist(PM)Commented:

Can you Please provide more details about the error you get like Source - Event ID and so on.

Mohammed TahirCommented:
If IPv6 protocol is disabled from NIC card on your Windows SBS 2008 server you may face this kind of issues.

Make sure that IPv6 protocol is Enabled on your server's NIC Card.


Dash AmrSenior Specialist(PM)Commented:
disabled IPv6,could be the  issue

or else you might need to look at three options:

    Making the site association static using a registry key, which isn’t a best practice. If you must, set registry key HKLM\SYSTEM\CurrentControlSet\Services\Netlogon\Parameters\SiteName(REG_SZ) to the desired site name;
    Adding proper subnet definitions;
    Remove the empty site definition.

It turned out the empty site was a place holder for a future site, so we went with the option of adding proper subnet definitions. After adding subnet definitions, like you normally should when working with multiple sites, including the scopes where the Exchange servers and domain controllers were located, and associating it with the main site, things started working again.

Note that the NetLogon service determines site association membership at startup and every 15 minutes. The Microsoft Exchange Discovery Topology service maintains this information by caching the information in the msExchServerSite attribute of the Exchange server object, in order to reduce load on active directory and DNS. Therefore, you might need to wait or restart Microsoft Exchange Discovery Topology if you want to renew site association membership.
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