This optional parameter enables the use of bound variables (where supported by the SQL server) and query caching in the UserAttrQuery and ServiceAttrQuery strings. If you specify one or more AttrQueryParam parameters, they will be used in order to replace parameters named with a question mark (“?”) in the UserAttrQuery and Service- AttrQuery queries, and the query will be cached for future reuse by the SQL server. %0 is replaced by the appropriate user name or service name. For more information, see Section 3.8.1. SQL bind variables.