My wife runs a community center and has their email and calender  synced between her home laptop and the community center PC via office 365 and Outlook 2016 and Outlook.com .

This morning she called me a in a panic saying that half her calender entries had vanished at the com  center.  I ran up her home PC and sure enough they were gone.  They were there last week.  Logged into the com center Outlook.com online account and it was the same.  Some entries being 12 hours out. After do some online research I found that her Outlook.com calender had some how gone  into Pacific standard time.  reset that back  to NZST and the online calender all came back as normal but the Outlook 2016 was still out on both PCs  with large wholes in the days.  Waited about an hour but no change.     More online research  indicated that this was  a problem encountered my several people and most solved the problem by deleting their Outlook account on  their PC and recreating it again.  I did this and on both PCs and  the calenders were synced again.  The odd this now is that that account now shows as being connected to Microsoft Exchange where the old account was connected to Exchange -Active Sync.

I deleted my account on my  PC that was connected as Exchange Active sync and recreated it again but it still shows Active Sync where as the com center account I setup on my PC shows Microsoft Exchange. 

Is Microsoft migrating accounts from Active Sync to Microsoft Exchange  with Outlook.com accounts or what ??  Even the online look and feel of the calenders is different between the Active Sync and Microsoft Exchange

Thanx in advance..