> For the complete documentation index, see [llms.txt](https://helpcenter.xopero.com/xopero-one-en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://helpcenter.xopero.com/xopero-one-en/common-issues/workstations-and-servers/device-did-not-connect-to-the-management-service.md).

# Device did not connect to the Management Service

## Issue

> The device is not connected to the **Management Service** after **agent** installation.

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## Resolution

If the device is not connected to the **Management Service** after **agent** installation:

1. Make sure you used the correct **Xopero ONE agent** installer. Note that installers differ for **Windows Server 2008R2**, **2012**, and **2012+**.
2. Verify that the **Management Service** address is configured correctly (using, for example, the **config.json** file located in the **agent’s** installation directory).
3. Ensure that communication between the **agent** and **Management Service** is not blocked—either on the configured port for on-premise installations or between the **agent** and cloud-based **Management Service** for SaaS deployments.
4. Check your local firewall settings.
5. Verify if a **feature worker** license was not assigned by mistake (which, in this case, would be an incorrect license). Check the **Workers** tab in ⚙️ **Settings** (⚙️ **Settings** > **Advanced** > **Workers)**.