RD Web Access: Server Error in ‘/RDWeb/Pages’ Application. Runtime Error

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Microsoft Remote Desktop Services

One of our users reported that he can’t login to the RDWeb access and throwing the Application.Runtime Error after entering the login page as the image below:

RDWeb runtime error

How to resolve

Check if the user’s password has special character “<“

This is recommended solution. After confirming with the end-user, I found they change their password with the special character “<“ on the password.  The result of the password change resolved the error when accessing RDWeb.

Modifying your RDWeb login.aspx

Please make a backup copy before making any changes.

By default login.aspx is located under C:\Windows\Web\RDWeb\Pages\en-US on a US English install. On the page, change the validateRequest to false.

<% @Page Language="C#" Debug="true" validateRequest="false" %> 

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