Microsoft has banned its employees from using the free version of Slack, reportedly due to security concerns.
has a list of prohibited software and services, and even Amazon Web Services (AWS) and are discouraged for use inside the company, The Verge reported on Saturday.
As per the company,Free, Slack Standard and Slack Plus versions do not provide required controls to properly protect Microsoft Intellectual Property (IP) and hence it advises that staff should use its internally developed software instead.
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.
Slack Enterprise Grid version complies with Microsoft security requirements, however, we encourage use of Microsoft Teams rather than a competitive software.
The document states that Amazon Web Services and Google Docs compete directly with Microsofts Azure cloud and Office 365 respectively, and are discouraged for use and require a business justification.