I'd like to know the best way to configure an exchange server in this situation: internal domain: domain.com (we do not own this domain, the tech before created the domain and didnt use domain.local) external domain used for email: domainabc.com ( we own this domain) server name: Exchange currently if i do a get-webservicesvirtualdirectory | fl it returns the following: internalurl = https://Exchange/EWS/Exchange.asmx Externalurl = https://mail.domainabc.com/EWS/Exchange.asmx we are using a UCC cert, but cannot add the domain: "domain.com" because we dont own it. OOO assistant isnt working on the outside becuase it cant resolve https://Exchange So I'm assuming i need to change the internalurl to https://mail.domainabc.com Is this correct? Brad Nelson MCSE/DCSE/A+/Network+/WCSP

Yes, you are correct. Set up split-DNS so the mail.domainabc.com resolves to internal address from the inside and external addresses from thr outside. Then configure all of your "internalURLs" the exact same as your "externalURLs". This will solve your issue. Also, don't forget to configure the AutodiscoverServiceInternalUri as shown below: Set-ClientAccessServer -Identity CAS_Server_Name -AutodiscoverServiceInternalUri https://mail.domainabc.com/autodiscover/autodiscover.xml Remember, whatever names are configured in your URLs in Exchange must be in the certificate.Tim Harrington | MVP: Exchange | MCITP: EMA 2007/2010, MCITP: Server 2008, MCTS: OCS | Blog: http://HowDoUC.blogspot.com | Twitter: @twharrington

Hi agree with TWHarrington. You will need to setup Split DNS. For more information refer to below links: http://technet.microsoft.com/en-us/library/dd638104.aspx ThanksNagaraj N