Outlook 2016 Slow, Crashing, Sluggish

Click File

Click Slow and Disabled COM Add-ins

Outlook will display and Add-ins that have caused a crash or causing slowness

Inspect any add-in with a red status bar (under 1 second is acceptable)

Disable any Add-in with a red status bar (over a second) by clicking Disable this add-in

Click Close

Outlook normally disables slow add-ins unless they are marked “Always enable this add-in”