And Authorization Number _best_: Sketchup 2017 License Key

For users of SketchUp 2017 , licensing works differently than modern subscription-based versions. SketchUp 2017 uses a Classic License, which consists of a Serial Number and an Authorization Code.  Finding Your License Details 

Once you have your Serial Number (typically starts with "S") and Authorization Code, follow these steps: Sketchup 2017 License Key And Authorization Number

Trimble Inc. (the parent company of SketchUp) formally ended support for SketchUp 2017 on November 4, 2020. While the software continues to function for existing users, the infrastructure required to authorize new installations—specifically the "License Key" and "Authorization Number" system—has been fundamentally altered. For users of SketchUp 2017 , licensing works

1. The 2017 Licensing Architecture

SketchUp 2017 represents the final major release before Trimble transitioned fully to a subscription-based model (cloud licensing). Understanding how the 2017 authorization worked requires distinguishing between the two components users often confuse: (the parent company of SketchUp) formally ended support

If you already purchased a license but cannot find the details, try these methods: