Microsoft Office is Microsoft's desktop suite of Word, Excel, PowerPoint and Outlook, sold as Office LTSC through volume licensing and as Microsoft 365 Apps. Pages here cover replacing it with LibreOffice, Collabora Online or ONLYOFFICE.
Comparing Microsoft Office with LibreOffice for an organization-wide desktop rollout: Writer, Calc and Impress against Word, Excel and PowerPoint, docx and xlsx fidelity, VBA macros, Outlook (which LibreOffice does not replace) and enterprise builds with partner support.
For teams that would rather edit in the browser than install a desktop suite: Office apps against Collabora Online inside Nextcloud or another WOPI host, co-editing, format support and the per-user Collabora subscription compared with Office licenses.
A rollout plan from Microsoft Office to LibreOffice: inventorying VBA macros and templates, choosing ODF or Microsoft formats as the default, piloting with heavy Excel users, packaging and policy deployment, training, and keeping a few Office licenses where they are still needed.
Cost of ownership by component: Office LTSC volume licenses or Microsoft 365 Apps subscriptions, against LibreOffice with an enterprise build and support from an ecosystem partner, plus migration, template rework, training and help desk time.
Office LTSC 2021 support ended in October 2026, a year after Office 2016 and 2019. This page sets out the choices for affected desktops (Office LTSC 2024, Microsoft 365 Apps, LibreOffice or browser-based editing) and how to decide device by device.
For offline and classified networks that rely on Office LTSC because it needs no cloud: LibreOffice deployed from internal repositories, Collabora Online or ONLYOFFICE on an internal server, activation and update handling, and document exchange with outside parties.
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