

for Windows downgrade rights it is true that downgrade rights only apply to products being in mainstream support - for Office afaik not, but better check the applicable document again. If you obtain Office 2019 via retail channel, you can check the respective EULA here: Į.g. Microsoft Office Microsoft Licensing So we have a VL with Office Pro Plus which has entitled us to use Office 2021 LTSC. I checked again, and also to my surprise I see that for Office we even offer VL customer the old 2010 media: However, this does not mean that Microsoft is required to supply a media or key for this old version. you have the right to use Office 2003 with that. In the Product Terms you can read (Universal Terms section) that downgrade rights are supplied without any restriction on the version - e.g.

5 Volume License Keys (VLK), including MAK and KMS, are issued to you. for Office 2019 obtained via Open License, the product terms do apply: Activate Windows with KMS ServerDownload Microsoft Office 2021 versions Pro Plus.

For people who looking for volume licensing (VOL) edition of Office 2010 programs, there are ways to convert and change Office 2010 retail installation to volume (VL) installation. The refernece for the downgrade rights are the licensing terms. Depending on the license encoded in the product key, the Office 2010 can be activated into trial version or full version product.
