Exchange Server 15.2.2562.46
Exchange Server Subscription Edition 15.2.2562.46 is the August 2026 Security Update (Aug26SU) for Exchange Server SE. The update provides Microsoft's latest security fixes for on-premises Exchange environments and supersedes the July 2026 Security Update, build 15.2.2562.45. Administrators running Exchange Server SE should prioritize deployment after standard compatibility and health checks. Microsoft confirms 15.2.2562.45 as the preceding July 2026 security build.
- Includes the August 2026 security fixes for Microsoft Exchange Server Subscription Edition.
- Addresses security vulnerabilities affecting supported on-premises Exchange Server environments.
- Supersedes the July 2026 Security Update, build 15.2.2562.45.
- Organizations should prioritize deployment to reduce exposure to vulnerabilities addressed by Microsoft's August 2026 security updates.
What's new
Exchange Server Subscription Edition 15.2.2562.46 is the August 2026 Security Update for Microsoft Exchange Server SE.
Security fixes- Includes Microsoft's latest security fixes for Exchange Server Subscription Edition.
- Addresses security vulnerabilities affecting supported on-premises Exchange Server environments.
- Includes security hardening and protections delivered through Microsoft's August 2026 security servicing cycle.
- Supersedes the previous July 2026 Security Update, build 15.2.2562.45.
Organizations running Exchange Server Subscription Edition should deploy build 15.2.2562.46 after standard compatibility testing. Administrators should also run the Exchange Server Health Checker before and after installation to verify configuration, update status, and server health.
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