Microsoft KB Archive/166225

= XWEB: Err Msg: Requested Header Not Found =

Article ID: 166225

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 5.0 Standard Edition

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This article was previously published under Q166225



SYMPTOMS
When you attempt to access a mailbox on a Microsoft Exchange Server computer by way of the Web, you may receive the following error message:

Internet Explorer cannot open the Internet site

http:// /exchange/LogonFrm.asp?Mailbox=.

The requested header was not found.

NOTE: is the name of the server running Internet Information Server (IIS) and the Active Server Components, and is the alias of the Exchange Server mailbox you are attempting to sign in from.



CAUSE
This error will occur if the only password authentication configured for IIS is Allow Anonymous.



RESOLUTION
To resolve this problem:


 * To log on to an Exchange mailbox, you must have either Basic (Clear Text) and/or Windows NT Challenge/Response Authentication on the computer running IIS. This is required in order to allow IIS to pass your user credentials on to a computer running Exchange Server.

Keywords: kbusage KB166225

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