Starting October 2020, Office 2013 Clients Will No Longer Be Supported by Office 365
Related services: Office 365 Productivity Bundle
Users who are still running Office 2013 or earlier versions should plan to upgrade their Office applications before October 13, 2020, in order to keep their systems fully compatible with Office 365 email and other services.
What do I need to know?
Starting October 13, 2020, Office 365 services will no longer fully support connections from Office 2013 and earlier clients for email or other cloud services.
While connections from these older clients will not be blocked, users running Office 2013 after this date can expect to encounter reduced performance, reliability issues, and increased security risks. Anyone running Office 2013 should therefore plan to upgrade to the latest available version of Office 365.
How do I tell what version I am currently running?
If you are unsure which version of Office your device is using, follow the steps on the Microsoft webpage What version of Outlook do I have? to view your product information.
If the Account Product Information area shows:
Office 2013 or earlier:
You should contact your IT support staff about upgrade options.
Subscription Product or a version of Office later than 2013:
You do not need to upgrade Office to avoid the issues outlined above.