Yes, MWS supports Custom Data Sources (links to external databases) and that database can be adapted to a directory using the Directory Services Administration → Database configuration.
However, the original question did not mention a database, which is why I asked if the customer’s directory service information was available via database or LDAP/ADSI. MWS supports LDAP/ADSI or Database based directory services only.
#MWS-CAF-Task-Engine#webMethods-BPMS#webMethods