EXO is safe

With the recent security updates released for all versions of Exchange:

The question comes up, is Exchange online in O365 safe? Yes. Where do you think the Product Group tested the fixes? With over 150,000 physical Exchange servers at last count, the PG has deployed the fixes to the environment.

For additional information on what was changed and updated, visit the eHelo site: https://blogs.technet.microsoft.com/exchange/2019/02/12/released-february-2019-quarterly-exchange-updates/