Connect rexx systems to Active Directory (on-premise)

Connect rexx systems to Active Directory (on-premise)

Connect rexx systems to Active Directory (on-premise)

When someone joins, moves or leaves in rexx systems, you want that change reflected in your on-premise Active Directory without anyone touching it by hand. To connect rexx systems to Active Directory, Joinly reads each HR change in rexx through the rexx API and applies it to your domain through the Joinly AD Agent — a lightweight connector that runs inside your network. rexx stays your source of truth; Joinly is the engine that keeps every account in the right OU, accurate and traceable.

Key takeaways

  • rexx HR stays your source of truth; Joinly applies every joiner, mover and leaver to on-premise Active Directory automatically.

  • The Joinly AD Agent runs inside your network and needs only an outbound HTTPS connection — no inbound ports and no domain controller exposed to the internet.

  • Joinly maps rexx org structures — Abteilung, Standort and Kostenstelle — to the right AD security groups and target OUs, and builds the sAMAccountName, UPN and distinguished name from your own rules.

  • The rexx export is bulk and one-directional with no native joiner/mover/leaver events; Joinly adds the change detection so each HR change becomes exactly one AD action.

  • Every action is logged for a complete audit trail, aligned with NIS2 and ISO 27001 — and the same setup extends to a hybrid Entra ID environment.

rexx systems

Joiner

Mover

Leaver

On-premise Active Directory (AD DS)

Quick facts

Source system

rexx systems (rexx HR / Personalmanagement)

Target system

On-premise Active Directory (AD DS)

Connection method

rexx API → Joinly AD Agent → Active Directory

Agent requirement

Domain-joined Windows server with a GMSA, outbound HTTPS (443) only

Supported events

Joiner, mover, leaver (change detection added by Joinly)

Synced attributes

Name, sAMAccountName, UPN, mail, department (Abteilung), job title, manager, cost centre (Kostenstelle), location (Standort), distinguished name / OU, start and end date

Real-time or batch

Frequent sync, multiple times per day

Compliance

ISO 27001, NIS2-ready, GDPR (EU data centre)

How does Joinly sync rexx systems to Active Directory?

Joinly reads each HR change in rexx in the cloud, then hands the action to the Joinly AD Agent inside your network, which makes the change in Active Directory. rexx HR holds the authoritative personnel record; the agent is the only component that touches your domain. Because the rexx export is bulk-oriented, Joinly diffs each import to work out exactly what changed before the agent acts.

  1. Joiner. HR completes the hire in rexx. Joinly reads the new record, determines the role from Abteilung, Position and Kostenstelle, and instructs the AD Agent to create the user in the correct OU, build the sAMAccountName and UPN from your rules, and add the right security groups — timed to the recorded start date (Eintrittsdatum).

  2. Mover. When someone changes position, department or location (Standort), Joinly tells the agent to move the user to the matching OU, swap security-group membership and update attributes. Access that no longer fits the new position is removed, so permissions stay aligned with the actual job.

  3. Leaver. On the exit date (Austrittsdatum), Joinly instructs the agent to disable the AD account and optionally move it to a disabled-users OU. A grace window keeps the account recoverable for a set period before it is retired.

Example: A logistics company runs rexx and an on-premise AD across three sites. It hires a warehouse planner with a start date next Monday. Joinly reads the rexx record, and on Monday morning the AD Agent creates the user in the Site-A > Operations OU, sets the sAMAccountName to a unique pattern, and adds the Warehouse-Operations group. When the planner later moves to dispatch, the agent moves the object to the new OU and swaps the groups the same day.

What manual AD account management costs

Without automation, every account starts as a rexx ticket that an admin works through in Active Directory Users and Computers by hand — creating the object, choosing the OU, building the sAMAccountName, adding groups. A plain rexx CSV export can list personnel, but it offers no role-to-group logic, no OU placement and no joiner/mover/leaver signal, so the decisions still fall to people.

  • Onboarding delays. New joiners wait for an AD account and group access while a ticket sits in a queue, losing productive days in their first week.

  • Permissions that don’t keep up (privilege creep). When movers change position or location, old security-group membership often stays attached, so people accumulate rights they no longer need.

  • Forgotten offboarding. Accounts that aren’t disabled on time are a security and audit risk — easy to miss when the source only delivers a full export rather than a clear leaver signal.

Joinly vs. the Entra provisioning agent for AD

Microsoft’s Entra provisioning agent can write a CSV or API HR feed to on-premise AD, but it stops short of the part that actually decides access. Here’s how the two compare for a rexx-driven AD setup.


Joinly AD Agent

Entra provisioning agent (rexx feed → AD)

Source

Reads the rexx API and diffs each import

Reads a full CSV / API export as-is

OU placement

Rule-based on Abteilung / Standort

Single configured container; limited logic

Role-to-group mapping

Built in, rule-based

Not available out of the box; manual

Joiner / mover / leaver events

Change detection layered on the bulk export

No native event model; full re-import only

Future-dated hires

Times creation to the start date

Needs custom date-window configuration

sAMAccountName / UPN rules

Custom transformation with uniqueness fallback

Limited expression mapping

Audit trail

Per-action logging tied to the HR source

Limited

Watch-outs when connecting rexx systems to Active Directory

A few details decide whether this connection stays reliable at scale.

  • sAMAccountName uniqueness and length. AD limits the sAMAccountName to 20 characters and it must be unique across the domain. Joinly builds it from your rules with a fallback pattern, so duplicate names never produce a collision or a truncated, unreadable login.

  • OU placement from rexx org structures. Abteilung, Standort and Kostenstelle don’t map one-to-one to your OU structure. Joinly builds explicit rules that place each user — and move them on a transfer — into the correct OU.

  • Bulk export, not delta updates. The rexx API export is primarily one-directional and returns the full population with no native joiner/mover/leaver event. Joinly compares each import against its last known state, so the agent only creates, moves or disables the objects that actually changed.

  • Module and tenant variations. rexx is modular and hosted in different ways, so the exact fields exposed differ per tenant and module mix. Joinly maps the fields you actually have via Liquid templates, so a local personnel number or a custom attribute still lands in the right AD attribute.

  • Service-account permissions. The agent acts under a service account with delegated rights. Joinly works with least-privilege delegation scoped to the target OUs, so the agent can create, move and disable users without domain-admin rights.

Joinly handles each of these by default with custom mapping and transformation.

Always audit-ready

Every account action the Joinly AD Agent performs is logged in the Joinly cloud: who was affected, when it happened, which OU and groups changed and which rexx change triggered it. For NIS2 that matters directly: access can be traced back to an authorised HR source rather than an ad-hoc request. Joinly is ISO 27001 certified, runs in an EU data centre in Amsterdam, applies least-privilege by default, and is built to meet NIS2 and ISO 27001.

Example case

Take a logistics company with around 2,600 employees across nine depots, running rexx systems but still living in an on-premise Active Directory for its warehouse and transport systems. Every new driver, planner or dock worker starts as a rexx ticket that IT processes by hand in AD — creating the object, choosing the OU, building the login, adding groups. With seasonal peaks and frequent moves between depots the queue never empties, and new joiners wait until day two or three for their account.

Connect rexx systems to Active Directory with Joinly and that work disappears. The Joinly AD Agent creates each user in the right OU on the start date, builds a unique sAMAccountName, adds the correct security groups, moves people on a transfer and disables accounts on the exit date with a 30-day grace window — all driven by the HR change in rexx and the daily diff that turns the bulk export into precise actions.

“A new driver is simply ready in the right OU when the shift starts, moves between depots handle themselves, and we can show the auditor exactly which rexx change created every bit of access.” — Head of IT, logistics company

The outcome this setup is designed for: onboarding drops from days to zero touch, privilege creep from old roles is eliminated, and the team can walk into its next NIS2 assessment with a complete, source-backed audit trail.

More than a connector

A standalone rexx systems to Active Directory connection is a good start, but identity rarely stops at one target. The same Joinly setup extends to Entra ID for a hybrid environment and to your other systems, managing the complete chain from joiner to leaver with logging and governance built in. You review the exceptions; Joinly maintains the chain.

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Installation manual

Installation manual

Connect rexx systems to Active Directory (on-premise)

Connect rexx systems to Active Directory (on-premise)

Installation guide

Follow these steps to connect rexx systems to your on-premise Active Directory with Joinly. Most of the setup happens in the cloud platform; the only local component is the lightweight Joinly AD Agent, which you install on a domain-joined server.

1. Create your account

Go to platform.joinly.app and create your account.

Note: charges may apply for using the platform after the trial period ends.


Joinly account creation screen at platform.joinly.app


Sign up at platform.joinly.app to get started.

2. Find the rexx systems integration in the Joinly marketplace

Open the Joinly marketplace and search for the rexx systems integration.

Don’t see your system listed? Get in touch at support@koppelhet.nl and we’ll help you out.


Joinly marketplace showing available HR integrations


Search the marketplace for the rexx systems integration.

3. Follow the installation wizard

You may be redirected to integrations.joinly.app. Create an account there and enter your rexx connection details: your rexx API base URL and API credentials / key. All data is encrypted and stored securely.


Joinly installation wizard for entering rexx systems connection details


Enter your rexx API endpoint and credentials in the wizard.

4. Download the Joinly AD Agent

In the platform, go to Workflows → Select a workflow → Add action → Select ‘Provisioning via Agent’ and download the installer. The agent is a lightweight Windows service that connects your domain to the Joinly cloud over an outbound HTTPS connection only — there are no inbound ports to open.


Joinly platform screen to download the AD Agent installer


Download the Joinly AD Agent installer from the provisioning settings.

5. Install the agent on a domain-joined server

Run the installer on a domain-joined Windows server that can reach a domain controller. The server needs outbound HTTPS (port 443) to the Joinly cloud and a GMSA account installation on your domain controller. Run through the installer; it registers the agent as a Windows service that starts automatically.

6. Pair the agent with your Joinly tenant

Copy the pairing token from Settings → Provisioning → AD Agent in the platform and paste it into the agent’s configuration screen. The agent uses the token to register securely with your tenant; once paired, its status shows as Connected in the platform.


Joinly AD Agent pairing screen with a connection token


Pair the agent with your tenant using the pairing token.

7. Set the target OU and attribute mapping

Configure where users are created and how their attributes are built. Map the distinguished name / OU from your rexx org structures, and build the sAMAccountName, userPrincipalName, mail, department and manager with Liquid templates.


Joinly field mapping screen for rexx systems to Active Directory attributes


Select the OU and attribute mapping.

8. Configure your workflows

Create an onboarding (joiner) and offboarding (leaver) workflow with trigger-based execution, then an Identity updated workflow with a Create/update employee in Active Directory action so every change in rexx flows through the agent to AD. Add a threshold workflow that disables the account a set period after the exit date (for example 30 days), optionally moving it to a disabled-users OU.


Joinly workflow editor creating an employee onboarding workflow


Create a trigger-based onboarding workflow.


Creating a threshold workflow that runs days after the exit date


A date-threshold workflow disables accounts a set number of days after the exit date.

9. Network and firewall requirements

The agent needs outbound HTTPS (443) to the Joinly cloud and a GMSA account with PowerShell access to your domain controllers. No inbound firewall rules are required, and no domain controller is exposed to the internet. For high availability you can run the agent on more than one server.

Need cloud Entra ID provisioning as well? See our guide on connecting rexx systems to Microsoft Entra ID, or contact support at support@koppelhet.nl.

Frequently asked questions

Does the Joinly AD Agent need inbound firewall openings?
No. The agent only makes an outbound HTTPS connection to the Joinly cloud and acts on your domain controllers from inside the network through a GMSA with PowerShell access. There are no inbound ports to open and no domain controller is exposed to the internet.

What account does the agent run under?
A Group Managed Service Account (GMSA) with PowerShell access to your domain controllers, scoped to the target OUs so it can create, move and disable user objects without domain-admin rights.

The rexx export is bulk — how does the agent know who to change?
Joinly diffs each rexx import against its last known state in the cloud and only sends the resulting joiner, mover and leaver actions to the agent, so the agent creates, moves or disables just the objects that actually changed.

How is the sAMAccountName built and kept unique?
From your Liquid template, with the generateUniqueUsername helper falling back to the next pattern on a collision, all within AD’s 20-character limit.

Can I provision to both Active Directory and Entra ID?
Yes. The same Joinly setup drives a hybrid environment — the AD Agent for on-premise AD and the native Entra connection for the cloud. See the rexx systems to Entra ID guide.

Can I run more than one agent for high availability?
Yes. You can install the agent on multiple domain-joined servers so provisioning continues if one server is unavailable.

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