---
sourceDocument: Australia IT Service Management
sourceDocumentLink: https://servicenow-prod.fluidtopics.net/r/it-service-management

 Release :

    - australia

ft:locale :

    - en-US

ft:publication_title :

    - Australia IT Service Management

ft:clusterId :

    - itsm

bundleId :

    - itsm

workflow :

    - Technology


---

# Install ACC on Windows

# Install ACC for DEX on Windows {#ariaid-title1}

Release version: Australia  
Updated March 12, 2026  
![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read  
Install Agent Client Collector (ACC) to work with Digital End-User Experience (DEX) to monitor and collect data, provide insights into system performance, identify issues, and enable proactive maintenance.

## Before you begin

Install the ITOM Cloud Services plugin.

Create an agent registration key.

Role required: agent_client_collector_admin

## Procedure

1. Retrieve the publicly accessible gateway URL, based on your location.  
   * AMER (Americas): itomcnc-prod-gateway.amer.sncapps.service-now.com:443
   * EMEA (Europe): itomcnc-prod-gateway.emea.sncapps.service-now.com:443
   * APAC (Asia Pacific): itomcnc-prod-gateway.apac.sncapps.service-now.com:443
   {#install-acc-for-dex-windows__ul_tsf_fpf_wfc}
2. On the Windows server where the agent is installed, enter the following command:  

       msiexec /i <msi_file_path> /quiet /qn /norestart CONNECT_WITHOUT_MID="true" ACC_CNC="<gateway_endpoint>" REGISTRATION_KEY="<registration_key>" INSTANCE_URL="https://<instance_url>"

   The following table shows the parameter values in the command.
   {#install-acc-for-dex-windows__table_usf_fpf_wfc__entry__2}

   | Parameter | Description |
   |-|-|
   | CONNECT_WITHOUT_MID | Specify true to enable MID-less Agent Client Collector installation. If you don't specify a value, the regular MID Server websocket installation is invoked. |
   | ACC_CNC | Specify a public gateway endpoint for Agent Client Collector. |
   | REGISTRATION_KEY | Active and valid registration key for the agent to communicate with. |
   | INSTANCE_URL | ServiceNow instance that the agent is registered with. |
   | ACC_ALLOW_LIST | Optional string. To disable the allow list, set ACC_ALLOW_LIST=0. By default, the allow list is enabled. Note: Disabling the allow list compromises your system's security and is intended as a temporary measure while you're updating the allow list. After completing the update, enable the allow list by setting ACC_ALLOW_LIST=1. |
   | ACC_VALIDATE_SIG | Optional string. To disable verification of the installer certification validation, set ACC_VALIDATE_SIG=0 that you can add to disable the verification of the installer certification validation. By default, validation is enabled. Note: Disable the certification validation only when using non-standard signature validation tools. |
   [Table 1. Installation command-line parameters]

   {#install-acc-for-dex-windows__table_usf_fpf_wfc}
3. Start the Agent Client Collector service using the default ServiceNow user role created during this installation.  
   The default ServiceNow user role has the following privileges:
   * Performance Monitor: Viewing all performance counters in the system.
   * Log on as a service: Starting network services and services that run continuously, even when no one is logged in to the console.
   * Debug program: Monitoring the installed applications and collecting in-depth metrics and remedial actions, such as restart and stop.
   {#install-acc-for-dex-windows__ul_p1p_5s4_qdc}
4. To collect DEX metrics, restart the ACC service using one of the following methods:  
   * Add Remote Desktop user to ServiceNow user.
   * [Run as a local system account user](https://servicenow-prod.fluidtopics.net/X1ylfmfdELFR1F6aqW3_Ng "To fetch the complete playbook content data for a Windows device, the Agent Client Collector (ACC) must run as a local system account.").
   * [Run as a managed group user](https://servicenow-prod.fluidtopics.net/WCvmZzurwg~o_vt_421f3Q "Run Agent Client Collector (ACC) from a managed group account to meet your organization's security, manageability, and auditability requirements.").
   {#install-acc-for-dex-windows__ul_sdm_mwx_12c}
5. Restart the Agent Client Collector service.
* **[Run ACC as a local system account user](https://servicenow-prod.fluidtopics.net/X1ylfmfdELFR1F6aqW3_Ng)**   
  To fetch the complete playbook content data for a Windows device, the Agent Client Collector (ACC) must run as a local system account.
* **[Run ACC as a managed group user](https://servicenow-prod.fluidtopics.net/WCvmZzurwg~o_vt_421f3Q)**   
  Run Agent Client Collector (ACC) from a managed group account to meet your organization's security, manageability, and auditability requirements.