Switching from Microsoft 365: European Alternatives, Integration Gaps, and Migration Strategies (heise.de)

• European alternatives offer sovereign hosting but lower integration depth than M365.
• Three models: integrated suites, modular approach, managed services.
• Biggest hurdles: calendar/chat/meetings, mobile use, and user acceptance.

"Replacing Microsoft 365 with European alternatives is feasible but requires compromises in integration depth. Integrated suites suit organizations with limited IT resources, while modular approaches fit high-IT-maturity companies. Key pain points are seamless calendar, chat, and meeting integration, plus user adoption. Sovereign hosting and data control are weighed against the familiar M365 integration."