If you are using a loadbalancer in front of the ClientAccess server or want to reconfigure the internal URL to point to http and not https you need to reconfigure a couple of services with the correct url so that autodiscover functions properly. To do so I have created a simple script to ease the process using powershell. The script does the following:

• The server path is specified in the variable
• Then we use -identity * if you have more than one instance you need to specifiy wich instance you want to configure
• The url is generated using the variable and the default location of the services files
• After reconfiguring the services we do a test of the connectivity to verify the configuration
• Note that custom user credentials is used so that default credentials is not nessesary
• OWA internal url has to be set manually

To run the script do the following:

• Copy this into a txt file and rename it to a ps1 file
• Navigate to the location where the file is saved
• Use tab to get the correct run syntax

NOTE: This script has been updated in a post related to Exchange 2010 here: http://msunified.net/2010/01/13/configure-exchange-2010-internalurl-powershell-script/

$urlpath = "http://exchange-server.yourdomain.com"

Set-AutodiscoverVirtualDirectory -Identity * –internalurl “$urlpath/autodiscover/autodiscover.xml”
Set-ClientAccessServer –Identity * –AutodiscoverServiceInternalUri “$urlpath/autodiscover/autodiscover.xml”
Set-webservicesvirtualdirectory –Identity * –internalurl “$urlpath/ews/exchange.asmx”
Set-oabvirtualdirectory –Identity * –internalurl “$urlpath/oab”
Set-ActiveSyncVirtualDirectory -Identity * -InternalUrl "$urlpath/Microsoft-Server-ActiveSync"

Test-WebServicesConnectivity -MailboxCredential (Get-Credential <Netbios domain name>\<username>) -TrustAnySSLCertificate
Test-activesyncConnectivity -MailboxCredential (Get-Credential <Netbios domain name>\<username>) -TrustAnySSLCertificate