Greetings! We have 1 forest, 2 domains. Domain1: company.local Domain2: company.sth.local We have 2 exchange servers 2007 SP3. One in first domain and one in second domain. If a user from the first domain is connected inside our company LAN when he opens Outlook 2010 a pop up message appears security alert for trusting the certificate of the second exchange server. How should I get rid of it?bostjanc

Let me also mention another thing, that we had a problem with proxy server settings on primary domain not being correct. I have launched this command on both of exchange 2007 servers: Set-OutlookProvider EXPRT -Server $null Proxy settings seems to be fine for now, but I think that when 2nd exchange server is rebooted, when he is back online he somehow force his settings to users in first exchange in first domain. I don't know if that makes any sense. bostjanc

Greetings! We have 1 forest, 2 domains. Domain1: company.local Domain2: company.sth.local We have 2 exchange servers 2007 SP3. One in first domain and one in second domain. If a user from the first domain is connected inside our company LAN when he opens Outlook 2010 a pop up message appears security alert for trusting the certificate of the second exchange server. How should I get rid of it? bostjanc Hi Bostjanc Tow resolution to get rid of the certificate alert: · One is that need to install a trusted certificate in both the two Exchange servers (so that the certificate is trusted by Outlook client); · The second one is just building up two AD sites to separate your Exchange servers, or setting up the site affinity (so that Outlook located in company.local will not connect to Exchange server located in company.sth.local). I need to explain that, Outlook 2010 connects to Autodiscover service via LDAP query to Active Directory looking for all available SCP objects; when the results are returned, Outlook sorts and enumerates the returned results based on the client's Active Directory site. In another word, all CAS servers are available for Outlook 2010 clients based on the AD sites. That’s why your Outlook located in company.local domain connects to your second Exchange server located in company.sth.local domain. For more information, see How the Autodiscover Service Works with Clients at http://technet.microsoft.com/en-us/library/bb332063(EXCHG.80).aspx#HowTheADSWorks and How to Configure the Autodiscover Service to Use Site Affinity http://technet.microsoft.com/en-us/library/aa998575(EXCHG.80).aspx. Best regards, Fiona Liao Email: v-fiolia@microsoft.com IBS TechNet Forum Exchange Support Team Email: v-yuliao@microsoft.com Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Let me also mention another thing, that we had a problem with proxy server settings on primary domain not being correct. I have launched this command on both of exchange 2007 servers: Set-OutlookProvider EXPRT -Server $null Proxy settings seems to be fine for now, but I think that when 2nd exchange server is rebooted, when he is back online he somehow force his settings to users in first exchange in first domain. I don't know if that makes any sense. bostjanc I'd suggest you submit a new thread for this new questions, it is free for you. your understanding would be appreciated. Thanks, -FionaEmail: v-yuliao@microsoft.com Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.