The versions you connect is changing, meaning you will need to change Office versions more frequently or move to Office 365 ProPlus which is the subscription version of office.
Starting October 13, 2020, Office 365 ProPlus or Office perpetual in mainstream support will be required to connect to Office 365 services.
Mainstream support. Microsoft will offer mainstream support for a minimum of 5 years from the date of a product’s general availability
This Microsoft announcement gives more details:
This means if you are using Office 365, or planning to you need to consider the version of Office you have:
- Office 2010 – Stops working with 365 October 2020
- Office 2013 – Stops working with 365 October 2020
- Office 2016 – Stops working with 365 2021
Confused about Office versions, our friend Doug explains below