This variable provides a different option for the AD "get groups" call, because of a Microsoft API issue. Unfortunately, there's no good description as to when and why one option is needed versus the other.

Example

public override void SetSystemVars(BPLogix.WorkflowDirector.SDK.bp bp)
{
    //Disable Collaborative Document Editing
    bp.Vars.fADSyncGetGroupsPC = true;
}