Hi all, We'll be deploying 2 x CAS in NLB and would like to load balance the below services both internally and externally. We have split DNS. Our OWA address is https://email.domain.co.uk. email.domain.co.uk would resolve to the CAS NLB cluster IP. OWA Outlook Anywhere Autodiscovery OAB EWS ActiveSync Please confirm I have the correct cmdlets: Set-ClientAccessServer -Identity CAS1 -AutoDiscoverServiceInternalUri https://email.domain.co.uk/Autodiscover/Autodiscover.xml Set-WebServicesVirtualDirectory -Identity “CAS1\EWS (Default Web Site)” -InternalURL https://email.domain.co.uk/EWS/Exchange.asmx -ExternalURL https:// email.domain.co.uk /EWS/Exchange.asmx -BasicAuthentication:$true Set-OABVirtualDirectory -Identity “CAS1\OAB (Default Web Site)” -InternalURL https:// email.domain.co.uk /OAB -ExternalURL https://email.domain.co.uk /OAB -RequireSSL:$true Enable-OutlookAnywhere -Server CAS1 -ExternalHostname “ https://email.domain.co.uk” -ClientAuthenticationMethod “Basic” -SSLOffloading:$False Set-ActiveSyncVirtualDirectory -Identity “CAS1\Microsoft-Server-ActiveSync (Default Web Site)” -ExternalURL https:// email.domain.co.uk /Microsoft-Server-Activesync I'm assuming that I'll need to run all of the above on the second CAS (CAS2) server also? Also, would I need to have autodiscover.domain.co.uk on my SAN cerificate and an A record for it DNS pointing to the CAS NLB IP? As far as names on the cert would this be ok: CN=email.domain.co.uk SAN=CAS1.domain.co.uk SAN=CAS2.domain.co.uk Or, as above, would I need to have a SAN of autodiscover.domain.co.uk on there too and if so why? I understand external clients will search for the XML file in the following order: https://<<var>smtpdomain</var> >/Autodiscover/Autodiscover.xml https://autodiscover.<<var>smtpdomain</var> >/Autodiscover/Autodiscover.xml http://autodiscover.<<var>smtpdomain</var> >/Autodiscover/Autodiscover.xml Thanks in advance. Graham

I've just realised that I will need to have an A record for autodiscover.domain.co.uk in DNS. Either that or we can use the new DNS SRV lookup method.

Hi there, Could anybody advise whether I have the correct cmdlets? Regards,

Hi,Yes, you need to run the above command on the second CAS. And the autodiscover.domain.com should be included under SAN which needs to be pointed to the CAS NLB IP address.Of course, the SRV record can also be used to replace the autodiscover.domain.com under SAN.http://www.msexchange.org/articles_tutorials/exchange-server-2007/high-availability-recovery/load-balancing-exchange-2007-client-access-servers-windows-network-technology-part1.htmlThanksAllen