The length of the query string for this request exceeds the configured maxQueryStringLength value. [System.Web.HttpException @ System.Web]
Management Platform formerly known as Notification Server 8.1 RU5
The error references a legacy IIS setting that is not available to set in IIS Manager at specific pages. The query string generated is longer than IIS's default setting for maxQueryStringLength allows.
In this case the page being hit was "/Altiris/TaskManagement"
Attached to this article is a modified web.config. Download and copy it into ".\Program Files\Altiris\TaskManagement\Web" then reset IIS on the SMP server.
Or, edit the web.config file in the above mentioned folder and search for the following: