http://blogs.technet.com/toml/archive/2009/06/29/ocs-r2-mmc-find-users-could-not-create-the-query-dialog.aspxWe had an internal question about a deployment where an upgrade from OCS 2007 to OCS 2007 R2 was resulting in the error: Could not create the query dialog in the MMC.  Here is how the consultant described the customer problem: I just completed aen-USCommunityServer 2.1 SP1 (Build: 61025.2)