You will have to do one of the following
- Use a single-use license with your ArcGIS Pro install
- Borrow / use the named user license offline
To use a license offline, open ArcGIS Pro, click on the settings button in the bottom left corner, click on the licensing tab on the left hand side, and check the box that says "take this license offline". If the named user license comes from an ArcGIS License Manager, there is a limited number of days (usually 30) the license can be checked out. If it's coming from ArcGIS Online, you can check it out for a longer period of time.