Do you remember when they bought the first and largest webmail platform and did nothing with it?
It has since been rebranded as MSN Hotmail, Windows Live Hotmail, Hotmail, and Outlook, likely with some 365 thrown in.
Meanwhile, they have mismanaged their once great mail user agent Outlook Express, as well as their quite useful personal information manager Microsoft Outlook, to the point where their newest offering is absolutely unusable.
The legend was that they tried and finally sticked with Freebsd, because Windows was not able to cope with the level of traffic.