Document handling of DeploymentCanceled error

Author: NirajC-Microsoft

docs/TroubleShootingSteps.md

@@ -531,5 +531,22 @@ If the server was deleted, either restore it (if possible) or update references
  
 </details>
 
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+<details><summary><b>DeploymentCanceled(user.canceled)</b></summary>
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+- Indicates the deployment was manually canceled by the user (Portal, CLI, or pipeline).
+
+- Check deployment history and logs to confirm who/when it was canceled.
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+- If accidental, retry the deployment.
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+- For pipelines, ensure no automation or timeout is triggering cancellation.
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+- Use deployment locks or retry logic to prevent accidental cancellations.
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+</details>
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+
+
 💡 Note: If you encounter any other issues, you can refer to the [Common Deployment Errors](https://learn.microsoft.com/en-us/azure/azure-resource-manager/troubleshooting/common-deployment-errors) documentation.
 If the problem persists, you can also raise an bug in our [MACAE Github Issues](https://github.com/microsoft/Multi-Agent-Custom-Automation-Engine-Solution-Accelerator/issues) for further support.