Note - The above article lists steps for all Microsoft Office 2016 applications, however, follow the steps to open Outlook 2016 in the Safe Mode. Check now if you are able to insert screen-clipping normally into Outlook 2016 while working in the Safe Mode.
Word for Office 365 for Mac Word 2019 for Mac Excel 2016 for Mac PowerPoint 2016 for Mac Word 2016 for Mac. Click where you want to insert a screenshot. Click Insert Screenshot. You can either insert a screenshot from the gallery or take a new screenshot. To Do this Insert an existing screenshot Click an image from the screenshot gallery. Insert a new screen clip Click Screen Clipping and drag the mouse pointer to capture a screenshot.
The captured screenshot will show in your document.