Outlook for MAC shows “Monday, 1 January 2001” for invites

Hello,

Our Outlook for MAC connects to our corp exchange in our organization.

Me and several other MAC users using Outlook's "New Outlook" report that some invites show a date of “Monday, 1 January 2001”.

When moving to "Old Outlook" or in OWA, the date looks fine.

What can be done?