Add-ins have disappeared
It seems all references to add-ins have disappeared from the beta. Previously you could install add-ins from Settings > Manage add-ins and they would appear as a strip of icons at the top of an email.
Are add-ins gone for good or have they just not made it to the beta yet?
Scott Lezberg commented
Same question for me - where are the add-ins in the new outlook.com interface?
I've been using the beta for months, but just had to switch back due to this issue.