Software giant says it is working to existing agreement
New feature will allow users to work collaboratively on a document.
Patched Unix OS released 21 years after original launch.
Android Lollipop MR1 screenshot displayed at Devoxx
And strong Surface Pro 3 sales boost Win 8.1 higher than ever before.
Ruben reportedly faced constraints in the company.
Authority to replace BlackBerrys with 'secure' Windows Phone 8.1 operating system.