# I can't invite students to my course Course invitation links expire automatically in order to prevent unintended access to course content. By default, the invitation link expires three months after the space is created. After the link has expired, any attempt to use it will be rejected. ## Refreshing the link To generate a new invitation link, open the invitation page. If the current link has expired, the invitation link section will display an option to create a new link. --- # 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.nuvolos.com/help-and-reference/troubleshooting/administration-troubleshooting/i-cant-invite-students-to-my-course.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.