For administrators whose G Suite domains meet the criteria to use SketchUp for Schools but still receive an "Unauthorized Account" error: please ensure that Google Classroom is enabled and that Google Classroom data access is allowed.
Why: SketchUp for Schools uses Google Classroom to ensure that users are associated with a K-12 institution and not a business or enterprise Google domain. While Google Classroom must be enabled for SketchUp for Schools to operate properly, it does not need to be used as your LMS.
Please note that by enabling Google Classroom data access any application or website which uses Google authentication may request access to Classroom. If Classroom is the primary LMS for your domain the data accessible pertains to assignments, class rosters, coursework, and guardian information within Classroom. However, access to each must be explicitly requested by every application or website.
As SketchUp for Schools is in beta, this is the current workaround for K-12 schools that are receiving an "Unauthorized Account" error. Students' personally identifiable information (PII) is still secure when Classroom data access is enabled, but we will continue to investigate alternative solutions.