Be aware that Excel in-constructed security characteristic is just not incredibly solid and you'll simply open worksheets/workbooks that have been locked. Nevertheless, if you'd like to speedily safeguard it prior to sending it to your supervisor/consumer (so they don’t finish up changing just about anything by slip-up), it works properly. https://www.reddit.com/user/OnenoteTraining/comments/1fixv1b/microsoft_365_training_a_comprehensive_learning/