Directory Services

This post summarizes some standards and implementations of Directory Services.

List of Directory Services


Lightweight Directory Access Protocol (LDAP) is a standard, not an implementation.

Official web

List of Directory Services Implementations

  • Active Directory
  • OpenLDAP

Active Directory

Active Directory is a solution by Microsoft that follows the X.500 standard.

Do not confuse with Azure Active Directory.

Active Directory is compatible with LDAP, unlike other Microsoft solutions like Azure Active Directory.


OpenLDAP is an open-source implementation of LDAP.

Official web

External References

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