Microsoft is pushing its customers into the cloud, including by forcing them to use newer versions of client software that are still officially supported by the vendor. Not every admin is happy about the push towards corporate cloud MS 365, but many users are stuck with Outlook, sometimes even older versions. This is the time to test grommunio – the best open source exchange replacement on the market. This summer, Microsoft announced that its Office 2016 through 2019 versions would no longer be able to access the Microsoft 365 cloud. With support for Office 2013 ending in April 2023, only the latest versions will be allowed to connect - as Microsoft's Jeremy Chapman pointed out in this blog post: "Importantly, Office 2016 & 2019 won’t be supported for connecting to Microsoft 365...

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