Outlook Calendar Attendees no longer working?

Hi All,

Has anyone else found the Outlook Calendar integration is not working as well as before? I have an integration set up to create new calendar event when a new item is created and update on changes to that item. I have been using a dropdown column to select attendees and this has worked fine for months until a week or so ago. The calendar event is created as normal, but updating seems to be hit and miss, sometimes working but slow to update and sometimes not at all. The inviting/ adding of attendees has completely dropped off!

Anyone experienced the same and found a fix? I tried rebuilding the integration but still not working.