http://blogs.msdn.com/chrishays/archive/2004/07/27/AllParameterValue.aspxQuestion: How can I enable users to select "All" as the value of a query parameter? Answer: The simplest way is to modify your query to accept nulls and map "All" to null. Step 1: Start with a report that already has a parameterized query and Valid Valuesen-USCommunityServer 2.1 SP1 (Build: 61025.2)