Check whether the user is using Chrome and whether the Microsoft Editor extension is installed. To check this:
Click the Extensions icon on the toolbar.
Click Manage Extensions.
If Microsoft Editor is installed, try the following fix:
Click the Extensions icon on the toolbar.
Click ... next to Microsoft Editor.
Click Manage Extension.
Set site access to on-click.
If this does not resolve the issue, remove the extension:
Click the Extensions icon on the toolbar.
Click ... next to Microsoft Editor.
Click Remove from Edge.
