Microsoft will end support for Exchange Server 2019 on October 14, 2025. From that date, there will be no security updates, bug fixes, or official support. Companies must therefore take action to ensure a secure, stable, and compliant email infrastructure.
The good news: There are several ways to future-proof your email systems. You can stick with on-premises solutions, run your infrastructure in a private Swiss cloud, choose a hybrid strategy, or migrate to Microsoft 365 / Exchange Online.
Each option has its specific advantages: On-premises provides maximum control and customization, the private Swiss cloud combines security with professional management, hybrid solutions allow a gradual transition, and Microsoft 365 offers automatic updates and scalability. This way, you can select the solution that best fits your company’s requirements, compliance needs, and IT strategy.
Private Swiss Cloud
- Data remains in Switzerland and is subject to Swiss data protection laws
- Professional operation: maintenance, monitoring, and security updates included
- Scalable and flexible while retaining control over data
- Licensing: Exchange licenses available as subscription or volume license, including maintenance and support
On-Premises Exchange Solutions
- Full control over data and IT infrastructure
- Customizable: backups, security policies, high availability
- Compliance with strict regulatory and data protection requirements
- Licensing: server licenses (Standard or Enterprise) + Client Access Licenses (CALs) per user or device
Hybrid Scenarios
- Combination of on-premises and cloud components
- Gradual migration possible
- Sensitive data stays on-premises, standard mailboxes can be moved to the cloud
- Licensing: combination of on-premises server license + CALs and Microsoft 365 subscriptions for cloud mailboxes
Migration to Microsoft 365 / Exchange Online
- Automatic security updates and bug fixes
- Scalable for growing numbers of users
- Integration with other Microsoft services (Teams, SharePoint, OneDrive)
- Licensing: Microsoft 365 is licensed per user subscription (Business Standard, Business Premium, E3/E5), including software, support, updates, and cloud resources
Recommended Actions
- Inventory: servers, mailboxes, mobile devices, archiving, compliance requirements
- Needs analysis: Which option meets your requirements for security, control, flexibility, and cost?
- Compare options: On-premises, private Swiss cloud, hybrid, Microsoft 365, alternative mail servers
- Pilot project and testing: test migration, backup and recovery verification
- Planning and implementation: include high availability, monitoring, training, and support
Conclusion
The end of support on October 14, 2025, is a turning point for your email infrastructure. Whether on-premises, private Swiss cloud, hybrid, or Microsoft 365, each option has specific advantages. What matters most is choosing a solution that fits your requirements, security policies, and IT strategy.
👉 For questions about migration, licensing, or strategy, our specialists are always available. Contact us – we look forward to your message or call.
