In this document below user source type requirements described.
Active Directory Requirements
MonoSign supporting Unified Directory architecture. It means you can use external or internal user directory. MonoSign natively supports Microsoft Active Directory/LDAP servers. Active directory integration can be performed with the following user permissions.
A service user must be created in the active directory.
Example service user name “monosign_svc“
Standard Active Directory User Permission
Password Reset/Unlock Account
Password Reset/Unlock Account features needed Self-Service Portal(SSP) license.