To avoid potential security, and compliance risks, we recommend upgrading to Microsoft 365 E3, which includes Microsoft 365 Apps and all the familiar applications such as Word, Excel, PowerPoint, and Outlook.
Will all builds of outlook 2016 and 2019 connecting to exchange online not be supported in Oct 2023
Will all builds of Outlook 2016 and 2019 not be supported in Oct 2023 to connect to Exchange online?
"Office 2016 and Office 2019 clients will no longer be supported to connect to Microsoft 365 after October 10, 2023. After this date, these Office versions may still be able to connect to Microsoft 365, but that connection won’t be supported, and end users might experience performance or reliability issues over time."
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ChristyZhang-MSFT 23,146 Reputation points Microsoft Vendor
2023-01-18T07:42:05.7333333+00:00 Hi @jennylee ,
Welcome to our forum!
According to the official document, the connection to O365 will be support till that time (Oct 2023), but we can't guarantee all features will be supported in old versions of Outlook 2016/2019.
Therefore, to provide the best experience with using Microsoft 365 services, we strongly recommend that you move off older Office versions to versions supported for connecting to Microsoft 365 services.
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Ivan Vojt 0 Reputation points
2024-03-10T22:21:33.6933333+00:00 Yes you can add .PST files as data files in Outlook 365, File > Open & Export > Open Outlook Data File