Hi @Emilie_Cibien, yes, the Active Directory should be changed to LDAPS using port 636. And no, you just need to import the root authority certificate of the server (with file extension “.pem”, “.cer” or “.crt”) in AccessAndSecurity > CertificateStore > ThirdPartyCertificates > SoftwareCertificates.
You then just need to set the Port and Certificate in the MpUserX configuration.
Please see the Use Case in the Help for setting up Active Directory user management in mapp UserX for a step-by-step setup guide: B&R Online Help
Also, keep in mind that for mapp UserX Centralized User Management via Active Directory requires the use of either (1) the User Principal Name (UPN), e.g. user1@domain-name.com, or (2) the Security Account Manager (SAM) name, e.g. DOMAIN/user1.
B&R Online Help