KB441428: How to restrict LDAP users from multiple Organization Units(OU) based on the same Root Distinguished Name(RDN) in MicroStrategy 10.x and above
Active Directory Filter Configuration
Understand LDAP Filter and Syntax - Easy365Manager
LDAP Search Filter and @SEARCH@ | Security
Configuring LDAP Queries
KB44183: "Incorrect login/password" error message appears when logging into Desktop using LDAP authentication through Microsoft Active Directory in MicroStrategy 9.x