# Activating the Product {% hint style="warning" %} **An active internet connection is required on initial activation of the aircraft.** After this, the aircraft can be used offline for a period of time. Our system will automatically check your license sporadically. If you require assistance or have a setup that prevents this from functioning correctly, please contact us at {% endhint %} Miltech Simulations’ Mission Hub uses a lightweight activation and version control system to ensure your product license is valid and always up to date. Depending on where you purchased the product, activation may differ: * **MiltechSimulations.com / Contrail App**\ A serial key is generated and automatically entered into the product. Under normal circumstances, activation happens silently and without user input. * **iniBuilds** \ A serial key is provided at the time of purchase. You must copy and paste this key into the toolbar activation popup. * **MS Marketplace**\ No activation key is required. The product activates automatically through the simulator platform. *** ### Common Activation Issues If the product fails to activate correctly, it may present in one or more of the following ways: * **Mission Hub Toolbar displays as fully black screen or nonresponsive** * **Error messages appear on the activation screen of Mission Hub** * **Activation prompt fails to accept a valid key or does not respond** If you experience any of these issues, please contact our support team with your purchase information and a brief description of the problem. We're here to help. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.miltechsimulations.com/miltech-mission-hub/product-information/activating-the-product.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.