Microsoft has banned a huge percentage of their staff from using Slack and Grammarly . Slack is a cloud-based set of proprietary team collaboration software tools and online services. While Grammarly is writing and grammar-checking app that can monitor every keystroke, Grammarly proofreading resources check against more than 250 grammar rules.


Both applications are part of the list of banned applications which are reported to be banned considering security. According to GeekWire report

“Slack Free, Slack Standard, and Slack Plus versions do not provide required controls to properly protect Microsoft Intellectual Property (IP). Existing users of these solutions should migrate chat history and files related to Microsoft business to Microsoft Teams, which offers the same features and integrated Office 365 apps, calling and meeting functionality. Learn more about the additional features that Teams can provide your workgroup. Slack Enterprise Grid version complies with Microsoft security requirements; however, we encourage the use of Microsoft Teams rather than competitive software.”

Grammarly has the same fate and it was reported that Grammarly Office add-in and browser extensions should not be used on the Microsoft network because they are able to access Information Rights Management (IRM) protected content within emails and documents,

According to GeekWire report, Microsoft has a list of prohibited apps and services, and even Amazon Web Services (AWS) and Google Docs are “discouraged for use” inside the company. The prohibited application list makes a lot of sense when looking at it from security and competition angle. However, it will be hard for the employee to know more about the outside world or what their competitors are doing if they are just restricted to the usage of the Microsoft only internal application. For example, instead of the Competitive Slack application, Microsoft employee will be using the Microsoft Team and instead of the Grammarly, they will be using the Grammer check in Microsoft Word.