XFOR: Internet Explorer Cannot Open, HTTP/1.0 500 Server Error (167280)

The information in this article applies to:

Microsoft Exchange Server 5.0

This article was previously published under Q167280

SYMPTOMS

When you use an Internet browser to log on to Microsoft Exchange Server, you are prompted to enter your user name and password. When you type the correct name and password, one of the following two error messages may appear:

Cannot open http://<server_name>/exchange/logon.asp

HTTP/1.0 500 Server Error (Not enough storage is available to process this command.)

CAUSE

The first error message appears when only basic (clear text) password authentication is being used, or when all three authentication methods (basic, anonymous, and Windows NT challenge/Response) are in use. Using all three is the default.

The second error message appears if anonymous authentication, Windows NT challenge/response authentication, or both are being used without basic authentication.

RESOLUTION

To resolve this problem:

Check the security permissions on the file Exchsrvr\Bin\Amhtml.dll and verify that the group Everyone has a minimum access level of Read.

To assign full control (or any other combination of rights) to the group Everyone.
In Windows Explorer, right-click the Exchsrvr directory and click Properties, and then click Security, and then Permissions.

Modification Type:	Minor	Last Reviewed:	4/21/2005
Keywords:	kbusage KB167280