Microsoft on September 16, 2021 announced that Microsoft Office 2021 LTSC and Microsoft Office 2021 for Mac LTSC had been released to open licensing as a finished product. The official sale date for consumers to purchase Microsoft Office 2021 and Microsoft Office 2021 for Mac is on October 5, 2021. This is considered to be a Long Term Servicing Channel release in that it is software that you own and not pay for monthly and that is not going to change in addition of new features or appearance of the software. This software is supported until 10/13/2026, about 5 years from now.
Microsoft Office 2021 for Windows it is available in both 32 bit and 64 bit versions, 32 bit is usually required for integration with other software so that will not be affected with this new version of the software. There are also Visio 2021 and Project 2021 releases as well that are a part of these software releases for Microsoft Office 2021.
Office LTSC Professional Plus 2021 includes Access, Excel, OneNote, Outlook, PowerPoint, Publisher, Skype for Business, Teams and Word. Office LTSC 2021 for Mac does not offer Access and Publisher.