SketchUp Pro 2018 licenses require online activation against Trimble’s authentication servers. A single serial number cannot be used simultaneously by hundreds of users.
There are several ways to obtain a Sketchup Pro 2018 serial number and authorization code: Sketchup Pro 2018 Serial Number And Authorization Code List
Finding your SketchUp Pro 2018 license details depends on whether you have an existing legitimate classic license or are attempting a new activation. uses a "Classic License" system (Serial Number and Authorization Code) rather than the modern sign-in subscription model used for current versions. 1. How to Find Your 2018 License Details SketchUp Pro 2018 licenses require online activation against
: If you cannot find your details, contact SketchUp Support with your original purchase information. Activation & Compatibility Notes How to Find Your SketchUp Serial Number: Expert Answers Sketchup Pro 2018 Serial Number And Authorization Code List