Can not disable some Add-ins in Outlook 2019 on Win10 , 20H2.

I can not disable ; 1.MSExchange Add-in
; 2.Outlook Social Connector 2016
; 3. Skype Meeting Add-in for MS-Office

Tried and tried for hours !
All kinds of possibillities , no succes , I dont need these Add-ins ( dont use them ) .
When disabled in the option-tab , they are indeed disabled , but........when opening Outlook again , they are all enabled again !!
HOW (??) to disable them for good , removing does not help either , they are all back and enabled after re-opening Outlook....
Im on Outlook 2019 Pro Plus , with the latest updates.