Deploy the CI HUB Connector as MS-Admin
If your company don't allow users to add any microsoft add-ins themself, an admin must deploy the CI HUB Connector Add-In for them. Microsoft provides a step-by-step explanation on how to do this here
https://learn.microsoft.com/en-us/microsoft-365/admin/manage/manage-deployment-of-add-ins?view=o365-worldwide