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Office versions and connectivity to Microsoft 365 services

https://learn.microsoft.com/en-us/deployoffice/endofsupport/microsoft-365-services-connectivity

The following table lists the Office versions that are supported for connecting to Microsoft 365 services. For example, connecting to Exchange Online, SharePoint Online, or OneDrive for Business.

Office version Supported for connecting until this date
Microsoft 365 Apps Supported as long as you’re using a supported version.
Office LTSC 2021 October 13, 2026
Office 2019 October 10, 2023
Office 2016 October 10, 2023

Older Office versions not supported for connecting to Microsoft 365 services

Older Office versions not listed in the table might still be able to connect to Microsoft 365 services, but that connectivity isn't supported.