It's too slow even in Wi-Fi conection
Get back to the older version (2015), the new outlook it's too too slow.
One of the main features of the personal mail box like gmail, or yahoo mail or like ours OUTLOOK Mail is that of creating rules. The "creation of rules" feature to move specific subject mails or on based on sender is PATHETIC in GMAIL and YAHOO. This is where OUTLOOK score. But OUTLOOK is very very very very slow. BTW, please be reminded I am using a 75MBPS speed fibernet connection.
So this is one area that I would like to give OUTLOOK to improve immediately .
OVERALL SPEED of the OUTLOOK MAIL and specifically direct your attention to improve features (in addition to speed) of the CREATION OF RULES.