> For the complete documentation index, see [llms.txt](https://docs.docontrol.io/docontrol-user-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.docontrol.io/docontrol-user-guide/risk-management/threat-model-coverage/4th-party-sharing/sharepoint-playbooks-for-4th-party-sharing.md).

# SharePoint playbooks for 4th party sharing

To mitigate the risk associated with 4th party sharing in SharePoint, you can customize automated workflows to remove external collaborators whenever an asset in SharePoint is shared with a 4th party. This workflow prevents third parties from sharing assets with unvetted parties. 

{% hint style="warning" %}
When an asset exists in a parent folder, collaborator access is removed from all assets in the folder.
{% endhint %}

1. In Workflows, select **Playbooks**.
2. Filter the playbooks according to the SharePoint app, and select the **Revoke 3rd party sharing with 4th party** playbook. 
3. Give an action name.
4. Under the **Added to secure link** event, define the relevant conditions:

   * The `Get actor` condition does **not** contain your organizational domain: @yourdomain.com.
   * The `Get target` condition does **not** contain your organizational domain: @yourdomain.com.<br>

   <div align="left"><figure><img src="https://3236294211-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MesrnyDMZGYg1V-tOBo%2Fuploads%2FnQOzIkdbilWXrXHPLks7%2Frevoke%204th%20sharing%20SP.png?alt=media&amp;token=f75a2d80-cede-4d92-baa4-af27fa61f69a" alt="" width="563"><figcaption></figcaption></figure></div>
5. Add any relevant conditions.
6. Customize the **Notify in Slack** action to notify your security team.
7. Under the **Remove collaborator** action, make sure the `Get asset ID` and `Get target` macros are selected.<br>

   <figure><img src="https://3236294211-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MesrnyDMZGYg1V-tOBo%2Fuploads%2FXvlRw6wnh9APQy7zANLi%2Frevoke%204th%20sharing%20SP2.png?alt=media&amp;token=a0bb629a-6c9a-4bd9-b396-ff8c4bf42d00" alt=""><figcaption></figcaption></figure>

When a 3rd party shares an asset with a 4th party in SharePoint, the security team is automatically notified by Slack or email, and external collaborators are removed from the asset.&#x20;


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