Article ID: 937031 - View products that this article applies to.
In a Microsoft Exchange Server 2007 and Microsoft Exchange Server 2003 mixed environment, an Exchange 2007 server is running the Client Access server (CAS) role. When mobile devices connect to the Exchange 2007 server to access mailboxes on an Exchange 2003 back-end server, the mobile devices cannot access their mailboxes. These mobile devices also may be prompted multiple times for a username and password. This occurs even though you enabled Integrated Windows authentication on the Microsoft-Server-ActiveSync (MSAS) virtual directory in the Internet Information Services (IIS) Manager on the Exchange 2003 back-end server. Additionally, the following event is logged on the Exchange 2007 server that is running the CAS role:
Event Type: Warning
This problem occurs because the DS2MB process on the Exchange 2003 back-end server turns Integrated Windows authentication off.
Hotfix informationA supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
PrerequisitesMicrosoft Exchange Server 2003 Service Pack 2 (SP2) must be installed before you apply this hotfix. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/836993/ )How to obtain the latest service packs for Exchange Server 2003
Restart requirementYou do not have to restart the computer after you apply this hotfix.
Hotfix replacement informationThis hotfix does not replace a previously released hotfix.
File informationThe English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
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Steps to enable Integrated Windows Authentication after you install hotfix 937031 on the Exchange 2003 back-end serverTo work around this problem, turn on Integrated Windows Authentication. To do this, follow these steps:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
It may be possible that the underlying problem is due to a misconfiguration of the NTAuthenticationProviders in the IIS metabase. You can configure IIS to support both Kerberos and NTLM protocols by running the following command:
cscript adsutil.vbs set w3svc/ WebSite /root/NTAuthenticationProviders "Negotiate,NTLM"For more information, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/215383/ )How to configure IIS to support both the Kerberos protocol and the NTLM protocol for network authentication