After you install Acrolinx, you should see the Acrolinx icon in your menu bar. If your menu bar is crowded, you might want to reorganize it so that you can easily get to the Acrolinx status menu.
To show the Sidebar, do the following:
Open either Word, PowerPoint, Sketch, or Outlook.
Select in the top menu.
Select Show Sidebar.
When you first open the Sidebar in an application, you might see some panels asking you for certain permissions. You need to accept these permissions for Acrolinx to work. The panels will pop up for Word, PowerPoint, Sketch, and Outlook separately.