Companies don't want 10 different products from 10 different companies that all have proprietary "standards". They don't want Hangouts for video, Pidgin for Chat, Thunderbird for E-mail, Chrome for Web browsing, Google voice for VOIP (not that google can pick what it plans to do with their hot mess of products anyways), Google docs is web only and NOT EXPORTABLE TO A USEFUL FORMAT(I know because I've had to migrate dozens of customers from it and it costs them tens of thousands because of it), dropbox for hosted storage, etc etc etc.
Microsoft offers their 1 proprietary package (which will be the end of them). They have MS TEAMS(chat), Outlook (Email), o365 (hosted platform), Office Suite (licensing can be included within Office 365), Sharepoint (intranet), OneDrive (storage), Skype (voip) and 1 single, easy to manage/pay bill.
GOOGLE DOESN'T OFFER THIS. Google can't be exported to standard open formats (Office suite can). This is what Microsoft offers and nobody else can compete with and they sell it by being SIGNIFICANTLY cheaper than the competition because they know once you are in the MS Eco system, you won't leave...it's too time consuming and costly.
Nobody else stepped up to the plate and MS will eventually burn them all by doing things like making Office 2016 only run on WIN10 or WIN16 to get more licensing sales. Thank you Apple.