What security teams need to know about the coming demise of old Microsoft servers | CSO Online

Microsoft is ending support for Exchange 2016 and 2019 in October 2025, leaving organizations with the choice of migrating to Exchange Server Subscription Edition (SE) or Microsoft 365. While SE offers a minimal migration path, organizations should consider the long-term costs and expertise required to maintain on-premises servers. Migrating to the cloud may be a more secure and cost-effective option, especially with the increasing focus on cloud-ready technologies.