Microsoft Office Plugin Enabled/Disabled Indicator?

1. What causes Outlook add-ins to disable?
2. How do I get rid of slow and disabled com add-ins?

What causes Outlook add-ins to disable?

Outlook sometimes disables add-ins if it believes that an add-in is interfering with Outlook's functionality.

How do I get rid of slow and disabled com add-ins?

On the File tab, select Slow and Disabled COM Add-ins in Outlook 2016 or select Slow and Disabled Add-ins in Outlook 2013. Select Disable this add-in below the add-in you want to disable. Select Close. Exit and restart Outlook.