Passing additional parameter in query string to a customized AdvFind.aspx form

If you ever need to pass additional parameters to a customized AdvFind.aspx or AdvFind.aspx itself from a vanilla install of CRM 4.0 you will most likely get the "Invalid parameter" error.

This can be resolved by creating the following DWORD registry entry under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSCRM called DisableParameterFilter, value=1.



After you've created the registry key you need to restart IIS. You will now be able to pass additional parameters in the querystring. In my requirements I had to pass a value on the crm form to my IFrame via the query string.