Problem

Seen on Outlook 2007 with Exchange 2007, is caused by using a self signed certificate or a purchased certificate, where the internal and external names are different. (Note. For Exchange 2010 see this note).

Solution

1. On the Exchange Server > Start > All Programs > Microsoft Exchange Server 2007 > Exchange Management Console.

Set-WebServicesVirtualDirectory -Identity "EXCHANGE-MAIL\EWS (Default Web Site)" -InternalUrl https://mail.publicdomain.co.uk/ews/exchange.asmx

Set-OABVirtualDirectory -Identity "EXCHANGE-MAIL\oab (Default Web Site)" -InternalUrl https://mail.publicdomain.co.uk/oab

Set-UMVirtualDirectory -Identity "EXCHANGE-MAIL\unifiedmessaging (Default Web Site)" -InternalUrl https://mail.publicdomain.co.uk/unifiedmessaging/service.asmx

For Small Business Server 2008

For SBS 2008 the commands are Different! (the following commands are for Exchange 2007 on SBS 2008 ONLY

Set-WebServicesVirtualDirectory -Identity "EXCHANGE-MAIL\EWS (SBS Web Applications)" -InternalUrl https://mail.publicdomain.co.uk/ews/exchange.asmx

Set-OABVirtualDirectory -Identity "EXCHANGE-MAIL\oab (SBS Web Applications)" -InternalUrl https://mail.publicdomain.co.uk/oab

Set-UMVirtualDirectory -Identity "EXCHANGE-MAIL\unifiedmessaging (SBS Web Applications)" -InternalUrl https://mail.publicdomain.co.uk/unifiedmessaging/service.asmx

Note: where EXCHANGE-MAIL is internal and mail.publicdomain.co.uk is external name

2. Then open the IIS Manager Expand Application Pools > MSExchangeAutodiscoverAppPool > Right Click > Recycle.

Note: You may have to enter the FQDN of the server rather than its netbios name!!

Updated - Exchange 2010 Note.

Exchange 2010 does not have a UMVirtualDirectory so the last command is NOT needed. (that funtion is now covered with the WebServicesVirtualDirectory).

Autodiscover

should you receive autodiscover certificate entries you may also need to run,

Set-ClientAccessServer –AutodiscoverServiceInternalUri https://mail.publicdomain.co.uk/autodiscover/autodiscover.xml

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