Mary Jo Foley / ZDNet:

Sources: Microsoft plans to build a WeChat-like experience across its 365 services in the form of a “MetaOS”  —  Microsoft has a strategy to build a WeChat-like experience across its various Microsoft 365 business and consumer services in the form of a ‘MetaOS’ foundational layer.

source http://www.techmeme.com/200915/p54#a200915p54