I need the license file (.lic) of geoevent.
License files of commercial products should be requested from their vendors.
In the case of the ArcGIS GeoEvent Server Extension for Server the Pricing page says:
For more details, call your local Esri office.
If your site is licensed, but you are not your site's administrative contact with Esri, then you should identify and contact your site's administrative contact using your organisation's internal procedures.