Using older versions of Outlook for Mac for personal email and calendar
Hi Sakols,
Greetings.
Thank you for raising your concern in this community.
From what I know, it can not be disable, I have done some tests, but was not able to see any setting for it.
I will advise you to confirm this result directly with our dedicated support in outlook for mac Contact support within Outlook for Mac (microsoft.com).
Thank you for your time and understanding.
Kind regards,
Mac