I lost an Outlook Add-In button. How do I get it back?

Overview

Updated 05/19/2021

If you recently logged into Outlook and are missing one of your Outlook add-in buttons, do the following to reactivate it.

1. Click on FILE tab (Outlook main screen, Top Left Corner)

2. Click on Options (left side corner of the window, on the blue strip, 2^nd last option)

3. On the window which pops up “titled – Outlook Options”, click on Add-Ins (left side corner of the window, 2^nd last option)

4. It will give a list of Add-Ins, scroll on the bottom of the list – “Disabled Applications Add-Ins”

5. Click on the Add-in which has to be re-enabled.

6. At the bottom of the window is a drop-down menu and the button “GO”. Change the drop-down menu to 'Disabled Items' and then click GO.

7. Another window will pop-up labeled "Disabled Add-Ins”, the checkbox for the Add-In which has to be activated

8. Click on “Enable”

9. You may need to close out Outlook entirely and open it again before the Add-In will reappear.