Dutch tax authority plans open-source replacement for Microsoft 365

The Dutch Tax and Customs Administration plans to move email and calendars from Microsoft 365’s cloud to on-premises servers, while seeking European open-source replacements for storage and collaboration by 2028. It is not a full Microsoft exit: Outlook and other Microsoft services will remain in use.
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https://4sysops.com/archives/dutch-tax-authority-plans-open-source-replacement-for-microsoft-365/