In a web app, we\'re looking to display a list of sam accounts for users that are a member of a certain group. Groups could have 500 or more members in many cases and we need t
A coworker of mine had similar issues with query times when using various Active Directory retrieval methods. He ended up caching the information in a database and refreshing it nightly and then just access the database instead.
Considering the fact that User Accounts don't change all that often, this was an acceptable compromise for him. Depending on your usage this may or may not be acceptable.