Office 2021 With Dark Mode Support Announced, Microsoft to Begin Rollout Later This Year Office 2021 LTSC version brings dark mode support across multiple apps and performance improvements across Word, Excel, Outlook, and PowerPoint. By Tasneem Akolawala | Updated: 19 February 2021 13:28 IST Microsoft says that the next version of Office will not ship with the Skype for Business Highlights Office 2021 will be released for Windows and Mac users Office 2021 will bundle Microsoft Teams app Microsoft has announced the release of Office 2021 and Office 2021 LTSC for personal and small business use. The Long Term Servicing Channel (LTSC) version is for commercial use and these new software releases will be made available later this year. A commercial preview of Microsoft Office LTSC will be available in April. Office 2021 is the successor to Office 2019, and the LTSC version brings along dark mode support across multiple apps and performance improvements across Word, Excel, Outlook, and PowerPoint.