Denmark ditches its plan to replace Microsoft Office with Collabora because it wasn't working with OOXML files

Source: mockup.photos Published Oct 24, 2026, 10:56 PM EDT Simon is a Computer Science BSc graduate who has been writing about technology since 2014, and using Windows machines since 3.1. After working for an indie game studio and acting as the family's go-to technician for all computer issues, he found his passion for writing and decided to use his skill set to write about all things tech. Since beginning his writing career, he has written for many different publications such as WorldStart, Listverse, and MakeTechEasier. However, after finding his home at MakeUseOf in February 2019, he would eventually move on to its sister site, XDA, to bring the latest and greatest in Windows, Linux, and DIY electronics. Sign in to your XDA account Summary Denmark trialed Collabora to ditch Microsoft Office, but it failed to open some OOXML files. A 38-person trial was paused for elections and later canceled after persistent import issues. Proprietary OOXML format makes migration painful; as long as proprietary files remain, swaps won't be seamless. Some European countries are taking their first steps toward digital sovereignty by removing their dependency on foreign tech. One such hurdle is getting rid of Microsoft products, such as Windows and Office, which is easy enough on paper. The only question is, what do you replace it with? Well, it turns out that Denmark has concluded: whatever its Office replacement will be, it definitely won't be Collabora. The country has announced that its trials with Collabora have come to an end because it can't use it to open its existing Microsoft Office files. Denmark's efforts to migrate from Microsoft Office come to a halt Collabora just wasn't doing the job it wanted As spotted by Neowin, Denmark's government declared its intent to cut its dependency on Microsoft Office by swapping over to Collabora. However, during the trial with 38 employees, they quickly discovered there were issues with trying to import Microsoft's proprietary OOXML format into the software. Sometimes, the pages they were trying to load ended up blank when loaded in the UK-based open-source productivity suite. The trial was then put on pause earlier this year for the elections, and now has been canned altogether. It's unclear whether Denmark will return to Microsoft Office or if it will try another trial with a different suite. However, this does give us a real-world example of LibreOffice's argument against the use of OOXML. As long as people continue to use proprietary software, swapping to a different suite will always be a hassle, and one could argue that's exactly what the company is banking on.