Unable to Connect to Licensing Server
With the current version of IronPdf (2024.10.x), some customers may experience the following exception error, even when they have an active internet connection:
Exception: IronPdf was unable to establish a connection to the licensing server. A valid internet connection is required for TEAM-type License Keys. In restricted environments, you need to whitelist: https://licensingapimanager.azure-api.net. For projects that require offline air-gapped environments with unlimited developers, projects, and locations, please consider the Unlimited Enterprise License at https://ironpdf.com/licensing/?utm_source=errormsg. For help, please reach out to us at https://ironsoftware.comCause
The root cause is due to a timeout setting on the IronPdf licensing server. When the connection times out, the internal process considers the connection lost, triggering the above error message.
Workarounds
Currently, there is no direct fix for this issue. However, you can try the following temporary workaround:
- Restart the project: Simply rerunning the project may help establish a successful connection with the licensing server.
- Check Firewall & Network Restrictions: Ensure that the required URL (
https://licensingapimanager.azure-api.net) is whitelisted and not being blocked by network policies or security software.
Upgrading to an Enterprise License would also avoid this issue, as the library operates entirely offline and does not upload any information to the cloud, making it suitable for air-gapped environments.
Ready to Get Started?
Nuget Downloads 16,021,023 | Version: 2025.11 just released
