ZWIEGNET Linux Consultants

Active Directory to LDAP Migration

Expert Migration Services from Microsoft AD to OpenLDAP, 389 Directory Server, or Red Hat IdM/FreeIPA

Professional guidance and hands-on support for migrating identity services from Active Directory to robust, open-source or enterprise LDAP solutions — with focus on schema compatibility, user/group data transfer, authentication continuity, and minimal disruption.

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Our Active Directory to LDAP Migration Services

Zwiegnet specializes in Active Directory to LDAP migrations for organizations moving to cost-effective, open-standards-based directory services. We offer deep expertise across **OpenLDAP** (highly flexible open-source), **389 Directory Server** (enterprise-grade, used in Red Hat Directory Server), and **Red Hat Identity Management (IdM/FreeIPA)** (integrated identity, Kerberos, DNS, and certificate management).

Migrating from Microsoft's Active Directory involves schema mapping, data export/import, handling password hashes (often requiring reset or sync strategies), adjusting authentication (PAM/SSSD/Kerberos), and integrating with Linux/Unix systems — while preserving Windows compatibility where needed (via Samba or trusts).

Our migration services include:

  • OpenLDAP Migrations – Custom schema extensions, LDIF export/import from AD, overlay configuration (memberOf, ppolicy, syncprov), and Samba integration for Windows/Linux mixed environments.
  • 389 Directory Server & Red Hat Directory Server – Schema compatibility mapping, replication setup, migration using tools like ldapsearch/ldif, and high-availability topologies.
  • Red Hat IdM/FreeIPA Migrations – Using ipa migrate-ds for directory imports, handling POSIX/RFC2307 attributes, Kerberos realm configuration, and trust setup for hybrid AD integration if desired.
  • Schema & Data Mapping – Mapping AD attributes/objectClasses (sAMAccountName, userAccountControl, memberOf) to LDAP equivalents, custom attributes, and conflict resolution.
  • User/Group/Password Migration – Export via PowerShell/CSV/LDIF, import with password reset strategies, one-way sync during transition, or migration tools/scripts.
  • Authentication & Integration – SSSD/PAM/NSS configuration for Linux clients, Samba/Winbind for Windows SSO, Kerberos cross-realm trusts, and application integration (Apache, Postfix, etc.).
  • High Availability & Replication – Multi-master setups, syncrepl or 389 replication, failover planning, and load balancing during cutover.
  • Security & Hardening – TLS enforcement, access controls, password policies, and auditing to match or exceed AD security posture.
  • Hybrid & Phased Approaches – Parallel run, gradual migration, AD trusts with IdM, or full replacement with minimal downtime.
  • Performance Tuning & Testing – Indexing, caching, load testing, and post-migration validation of authentication/search performance.
  • Troubleshooting & Support – Resolving replication issues, attribute mismatches, Kerberos ticket problems, and client enrollment failures.

Whether replacing AD entirely for Linux-centric environments or creating a hybrid setup, we deliver reliable, standards-compliant migrations with proven methodologies.

Located between Madison and Milwaukee, Wisconsin since 2009 — direct access to experienced migration specialists and directory engineers.

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