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EWS proxying requests fail after you run Availability Service requests in a CAS to CAS proxying scenario in Exchange Server 2007Article ID: 975165 - View products that this article applies to. SYMPTOMSConsider the following scenario:
Note If this problem occurs, and you then run the following command: Test-WebServicesConnectivity -ClientAccessServer <CAS server name in site one> -TrustAnySSLCertificate:$true -MailboxCredential $cred you may receive the following error message: [System.Web.Services.Protocols.SoapException]: An internal server error occurred. The operation failed. However, the error will not occur if you run the same command before you run the Availability service proxying request. $cred is the credential of a mailbox user in the back end site and the credential is from the return of the Get-Credential command. CAUSEThis problem occurs because EWS use a certificate validation mechanism which sets a static property of the certificate in a proxying scenario. However, the Availability Service uses a different validation mechanism to validate certificates. This different validation mechanism overwrites the static property of the certificate. Therefore, later EWS certificate validations fail. RESOLUTIONTo resolve this problem, install the following update rollup: 972076
(http://support.microsoft.com/kb/972076/
)
Description of Update Rollup 2 for Exchange Server 2007 Service Pack 2
STATUSMicrosoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. MORE INFORMATIONFor more information about Proxying for Exchange Web Services, visit the following Microsoft Web site: http://technet.microsoft.com/en-us/library/bb310763(EXCHG.80).aspx
(http://technet.microsoft.com/en-us/library/bb310763(EXCHG.80).aspx)
For more information about Availability service issues , visit the following Microsoft Web site: http://technet.microsoft.com/en-us/library/bb124805(EXCHG.80).aspx
(http://technet.microsoft.com/en-us/library/bb124805(EXCHG.80).aspx)
For more information about the Test-WebServicesConnectivity command, visit the following Microsoft Web site: http://technet.microsoft.com/en-us/library/bb676420(EXCHG.80).aspx
(http://technet.microsoft.com/en-us/library/bb676420(EXCHG.80).aspx)
For more information about the Get-Credential command, visit the following Microsoft Web site: http://technet.microsoft.com/en-us/library/dd315327.aspx
(http://technet.microsoft.com/en-us/library/dd315327.aspx)
PropertiesArticle ID: 975165 - Last Review: January 22, 2010 - Revision: 1.0 APPLIES TO
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