Dutch tax office ditches Microsoft 365 cloud for on-premises alternative

The Netherlands Tax and Customs Administration has abandoned its planned Microsoft 365 cloud migration in favor of services hosted on infrastructure it controls, alongside European open source alternatives. Email and calendars will move on-premises in 2027, followed by storage and collaboration services later that year and in 2028. The letter to parliament from Eelco Eerenberg, State Secretary for Finance, follows an earlier decision to pause the Microsoft 365 rollout.