> For the complete documentation index, see [llms.txt](https://help.security.gallagher.com/knowledge-hub/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.security.gallagher.com/knowledge-hub/products/cc-software/configure/identity-solutions-cardholders-and-ope/active-directory/active-directory-sync-features-and-fun.md).

# Active Directory Sync features and functions

Understand Active Directory Sync generations, cardholder replication, and filter behavior.

AD Sync provides **bidirectional cardholder replication** between Microsoft Active Directory and Command Centre, automating onboarding, offboarding, and role changes.

There are **two generations**, configured very differently:

* **v8.40 and below (legacy):** an XML-configured, certificate-secured architecture using the **FT Active Directory Sync Service**, a Control App, a Diagnostic client, and a Web Service server (default **port 8050**). See [Sync Checklist (v8.40 and below)](/knowledge-hub/products/cc-software/configure/identity-solutions-cardholders-and-ope/active-directory/active-directory-sync-checklist-v8-40.md).
* **v8.50 and above (current):** rebuilt on the **REST API**, forward-compatible with all later CC versions, and using AD Single Sign-On to authorize the config UI. The service is renamed **Gallagher Active Directory Sync Service**. See [Sync v8.50 - What's new](/knowledge-hub/products/cc-software/configure/identity-solutions-cardholders-and-ope/active-directory/active-directory-sync-v8-50-what-s-new.md).

Supported CC versions: v8.20, v8.30, v8.40, v8.50+, v8.90, v9.00, v9.10+.

## How filtering works

* AD user accounts are processed against the **Cardholder Filter(s)** configured in a **Replication Group**. Multiple filters can exist on one group; all are checked against every AD user in a valid container.

![AD Sync Replication Group configuration — group name, CC credential, "When Cardholder not in AD" set to Leave in Command Centre, Domain Controllers tab with server/port/AD credential](https://328339335-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F6bM8WhlBE9BYizPWJaPN%2Fuploads%2Fgit-blob-835c4c28a48c8b209f2a421e15fd49ec20116605%2FSECHUB-AD-SYNC-01-replication-group-config.png?alt=media)

![The Cardholder Filter's Valid Containers and Valid Groups selections](https://328339335-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F6bM8WhlBE9BYizPWJaPN%2Fuploads%2Fgit-blob-1fb41f840f95623e84b60c925f9dbb00ae719278%2FSECHUB-AD-SYNC-02-valid-containers-groups.png?alt=media)

* **When a cardholder is not in AD** (global): choose **Leave in Command Centre**, **Deauthorise in Command Centre**, or **Remove from Command Centre**.
* **When a cardholder is not in Valid Groups** (but is within the Valid Container): a separate action. If a cardholder is in neither the Valid Container nor the Valid Groups, they fall under the "not in AD" rule.

![The AD-to-CC Cardholder Filter dialog — filter name, "When Cardholder not in Valid Groups" set to Deauthorise, Sync Mode Create and update, Default Division](https://328339335-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F6bM8WhlBE9BYizPWJaPN%2Fuploads%2Fgit-blob-66a4e35eb61052ccbb87a679c326e0c6428f440e%2FSECHUB-AD-SYNC-03-cardholder-filter-dialog.png?alt=media)

![The "When Cardholder not in AD" dropdown expanded showing Deauthorise / Remove / Leave in Command Centre](https://328339335-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F6bM8WhlBE9BYizPWJaPN%2Fuploads%2Fgit-blob-2d6de00fc58f41fb9dba77e4861d1abb42ba780f%2FSECHUB-AD-SYNC-04-when-cardholder-not-in-ad-options.png?alt=media)

***

🔗 **Related**

* [Sync User Accounts Requirement](/knowledge-hub/products/cc-software/configure/identity-solutions-cardholders-and-ope/active-directory/active-directory-sync-user-accounts-re.md). Minimum permissions for both generations.
* [Sync - How to Sync New Images Automatically (Script)](/knowledge-hub/products/cc-software/configure/identity-solutions-cardholders-and-ope/active-directory/active-directory-sync-how-to-sync-new.md). Forcing image sync.


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