Ex2013 Free/busy on MAC Calendar

Hi,

I have problem on MAC calendar to see free/busy status.

When I create New event and add invitees status always shows free. When I go to "check availability" I see busy times and if change event time, in event windows busy status shows correct   

I tested same MAC on Ex2016 and Office 365  - works good only on Office 365

Outlook works good

Get-MailboxFolderPermission - shows all good