Microsoft has released Security Updates (SUs) for vulnerabilities found in:
Exchange Server Subscription Edition (SE)
Exchange Server 2019
Exchange Server 2016
SUs are available for the f...
Updated Feb 10, 2026
Version 1.0
Blog Post
Exchange Server SE, the SU's and HU's are so so slow at installing, it never used to be this bad, or is just me?
More work needs doing with regards to the interoperability with Microsoft Defender, which I believe is causing huge delays.
Computing Space requirements (EXE & MSP)
Long pauses during IIS recompilation
Longer “stopping/starting services” phase,
Longer “configuring updates” phase
Delays when stopping the Transport service
Component State corruption checks
Rebuilding the OWA/ECP virtual directories
More time spent rebuilding the Exchange services state,