As you know, connecting to Office 365 service using Office client and in this case Outlook requires to use specific version.
As part of it, Outlook client older than the below version will not be able to connect to Office 365 services after November 1st, 2021
- Outlook 2013 15.0.4970.9999 and older
- Outlook 2016 16.0.4599.9999 and older
- Outlook ‘M 365 Apps’ (aka Office 365 Pro Plus) 1705 and older
If you are still running any of these version start planning your upgrade to avoid connectivity issues.
hmm, there are no version other than 365 that works with Windows 8. What’s a boy to do?
Upgrade to Windows 10
You still have the free upgrade available even if officially this was ended few months ago; so this would be a good time to upgrade while the free upgrade is still available