Over time, these Office clients may encounter performance or reliability issues. Impact of using older Office clients to connect to Microsoft 365 servicesĪfter October 13, 2020, ongoing investments to our cloud services won’t take into account older Office clients. But these older clients may encounter performance or reliability issues over time. Microsoft did not say when it would drop Basic Auth support, however.įor those who haven't yet dispensed with the old Outlook clients, Microsoft recommended - as it has confidently - that they switch to the subscription model of Office 365 or Microsoft 365, which provides always-up-to-date client software.We won’t take any active measures to block other versions of the Office client that are still supported and are up to date, such as Office 2013 with Service Pack 1, from connecting to Microsoft 365 services. Microsoft explained that the older Outlook 2007 and Outlook 2010 clients will be incompatible with two upcoming changes to services, including an end to support for Basic Authentication - essentially, the long-standard username + password combination - that was postponed in February 2021. 1 deadline really will cut older Outlook clients from Microsoft's services. 'We won't take any active measures to block other versions of the Office client, such as Office 2013, from connecting to Office 365 services, but these older clients may encounter performance or reliability issues over time,' the developer said then.

At the time, Microsoft had been surprisingly gracious, saying that while support would officially end, that didn't necessarily mean the end of connectivity.

Outlook 2013 office 365