This report shows only completed certifications. Site Managers can export this report directly from the certifications page by selecting Users from the Resources menu in the right (as R909). You may also be interested in R209, a similar report on certification progress.
Run R227 to view multiple completed certifications of selected users. The report shows the certification earn dates and any associated expiry information.
The image below is an example of R227 with two certifications: one with an expiry, the other without an expiry.