Microsoft KB Archive/294216

= XCCC: &quot;HTTP 401.1 - Unauthorized: Logon Failed&quot; Error Is Displayed During an Attempt to Join a Remote Conference =

Article ID: 294216

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange 2000 Conferencing Server

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This article was previously published under Q294216



SYMPTOMS
When a Microsoft Exchange Server 5.5 user that is a member of a Microsoft Windows NT 4.0 domain uses Web Conferencing Scheduler to log on to an online conference that is being hosted in a remote site, authentication is rejected three times and then the user sees a Web page with the following error message:

HTTP 401.1 - Unauthorized: Logon Failed



CAUSE
This behavior occurs when a trust does not exist between the Windows NT 4.0 domain and the Windows 2000 remote site.



RESOLUTION
To resolve this behavior, establish a one-way domain trust between the Windows NT 4.0 and Windows 2000 domains where the Windows NT 4.0 domain is &quot;trusted by&quot; the Windows 2000 domain and the Windows 2000 domain is &quot;trusting&quot; the Windows NT 4.0 domain:
 * 1) In Windows NT 4.0, open User Manager for Domains.
 * 2) On the Policies menu, click Trust Relationships.
 * 3) Under Trusting Domains, click Add. Type the domain name of the Windows 2000 domain and a password, confirm the password, and then click OK.
 * 4) In Windows 2000, open Active Directory Domains and Trusts.
 * 5) Right-click the domain for which you want to build trust relationships, and then click Properties.
 * 6) On the Trusts tab, click Add next to the Domains trusted by this domain box.
 * 7) Type the Windows NT 4.0 domain name and the password, confirm the password, and then click OK.
 * 8) Allow time for replication.

Keywords: kberrmsg kbnofix kbprb KB294216

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