---
sourceDocument: Australia Enable AI
sourceDocumentLink: https://www.servicenow.com/docs/r/australia/intelligent-experiences

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    - australia

ft:locale :

    - en-US

ft:publication_title :

    - Australia Enable AI

ft:clusterId :

    - platai

bundleId :

    - platai

workflow :

    - Platform


---

# Explicit Block

# Explicit Block policies {#ariaid-title1}

Release version: Australia  
Updated August 27, 2026  
![](https://www.servicenow.com/docs/portal-asset/ico-clock) 2 minutes to read
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## Summary of Explicit Block policies

Explicit Block policies enable ServiceNow customers to centrally and automatically restrict access to AI agents, models, or domains for specific individuals, departments, or entire organizations.
This mechanism ensures consistent enforcement across all connected platforms without the need for custom scripts or manual access revocation.
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## Key Features

* **Universal Enforcement:** One policy covers all relevant platforms and connection points, maintaining restrictions even if some points are unavailable or not applicable.
* **Flexible Targeting:** Blocks can be applied to individual users, departments, AI agents, models, or domains using a single, unified policy type.
* **Persistent Policy:** Policies remain active until explicitly deleted, with no intermediate pause states.
* **Device-Level Enforcement:** Blocks apply regardless of the device or application used to attempt access, ensuring comprehensive control.

## Practical Applications

* **Restricting ServiceNow Arc Usage:** For example, blocking a single user during a security review or preventing all users from accessing ServiceNow Arc until approval is granted. The policy instantly ends active sessions and disallows new ones for the targeted users.
* **Controlling Access to AI Models:** Organizations can limit usage of specific AI models, such as allowing only internally hosted models or restricting external models to certain roles. A policy can block an individual's access to an external model without impacting others.

## Benefits for ServiceNow Customers

By implementing Explicit Block policies, customers gain a streamlined, reliable way to manage AI access controls that scale from single users to entire departments. This reduces operational overhead, enhances security compliance, and ensures policy consistency across all platforms where AI interactions occur.  
Stop a specific person, a department, or your whole organization from using an AI agent, model, or domain, enforced automatically everywhere that access could happen.

## Key benefits {#gov-pol-explicit-block__gov-pol-explicit-block-benefits}

* Stop a specific person, a department, or your entire organization from using an AI agent, model, or domain, without writing a script for each platform.
* Apply one rule consistently whether it covers a handful of contractors or thousands of employees, without reconfiguring it person by person.
* Keep enforcing at every connected point even if one point is unavailable or doesn't apply, instead of the whole block depending on all of them.
{#gov-pol-explicit-block__ul_pol_eb_benefits}

## How Explicit Block policies work {#gov-pol-explicit-block__gov-pol-explicit-block-how-it-works}

You define who's blocked and what they're blocked from, and publish it. Restricting access this way usually means writing a custom script for each platform involved, or relying on someone to remember to check and revoke access
manually; an Explicit Block policy replaces that with one rule, enforced consistently everywhere that access could happen. The policy stands until it's deleted; there's no pause or in-between state.

Enforcement is attempted independently at each connected point, so if one point is unreachable or doesn't apply, the block still takes effect everywhere else it can.

Because Explicit Block covers users, departments, agents, models, and domains under this same mechanism, the same policy type applies whether the goal is keeping a contractor off internally sensitive tools or keeping an entire department off a model that isn't approved for their work.

## Use cases {#gov-pol-explicit-block__use-cases}

Blocking access to ServiceNow Arc
:   Employees use ServiceNow Arc to ask instance-specific questions. The organization might need to block one person from using it, for example while a security review is underway, or prevent anyone from using it at all until that
    review is complete.

    An Explicit Block policy scoped to a specific person and ServiceNow Arc ends that person's active session and prevents them from starting a new one. Publishing the same policy without naming a person blocks everyone who has used ServiceNow Arc instead.

Blocking access to a specific model

:   Employees often reach AI models directly, outside of any agent or approved workflow, through a browser or a desktop app installed on their own machine. An organization might restrict this to internally hosted models only, or allow certain roles to use specific external models while keeping others off-limits.An Explicit Block policy can target a specific model for a specific person: for example, blocking one employee's access to an external model
    while leaving everyone else's access untouched. Enforcement happens at the device level, so the block applies no matter which application or browser the employee uses to try to reach that model.