Microsoft started rolling out a key technology from its Yammer acquisition earlier this week, and partners that have tried it out believe it could keep the Office cash cow healthy for years to come.

After years of work and months of teasers, Microsoft has released a tool called "Delve," which will do for Office 365 users what Cortana will do for Windows Phone users: manage their lives.

Microsoft has killed a Windows 10 Office app called Delve. This is interesting and notable because Delve was one of the first apps that demonstrated CEO Satya Nadella's vision for the company ...