Microsoft launches on-premises security initiative with baseline hardening for Exchange and SharePoint
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What happened
Microsoft has launched an on-premises security initiative, starting with server workloads, that combines guidance, migration to Microsoft 365 and product hardening. Its On-Premises Baseline Security Mode will cover Exchange Server, SharePoint Server and Skype for Business Server, with out-of-band Critical and Important updates already in use and automatic update application targeted for Q1 2027. Emergency Mitigation Service is being expanded to apply interim mitigations, with version 2.0 planned for December 2026 and SharePoint coverage for January 2027.
For IT people · Written by AI from 1 source · Wrong?
What to do
- Check whether Exchange Server, SharePoint Server and Skype for Business Server are running the current security update and apply it promptly.
- Use Tenant Configuration Management to find permissions that are broader than intended in supported server environments.
- Assess which on-premises workloads could move to Microsoft 365 and which must stay on-premises and need hardening.
Written by AI from the sources, checked against them
Full story timeline · 1 update
Who reported · 1 outlet
Microsoft Security Blog
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