Microsoft Office 2021 LTSC Professional Plus is a version of the Microsoft Office suite that is designed for organizations and individuals who require a stable and long-term solution for their productivity needs. The "LTSC" acronym stands for Long-Term Servicing Channel, which means that this version of Office will receive 5 years of mainstream support, followed by an additional 2 years of extended support. This results in a total support lifecycle of 7 years.

Microsoft Office 2021 LTSC Professional Plus can be obtained through various channels, including:

The Professional Plus edition is the most comprehensive package available, including: Word, Excel, and PowerPoint.