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Security Update (15.15.9) for Skype for Business (Lync) Room System.

Security Update (15.15.9) for Skype for Business (Lync) Room System.
Recently Microsoft released security updates 15.15.9 to remediate vulnerabilities reported.
Customers who has deployed the Crestron RL, Polycom CX8000, and SMART Room System machines on their environment are strongly recommended to apply the 15.15.9 as quickly as possible to ensure the integrity of these systems. These systems are based on Windows 7.
Above security update resolves the following vulnerabilities in Windows 7 SP1 and Windows Server 2008 R2 SP1:
·MS17-022 Security update for Microsoft XML Core Services
·MS17-021 Security update for DirectShow
·MS17-020 Security update for Windows DVD Maker
·MS17-019 Security update for Active Directory Federation Services
·MS17-018 Security update for Windows Kernel-Mode Drivers
·MS17-017 Security update for Windows Kernel
·MS17-016 Security update for Internet Information Services
·MS17-013 Security update for Microsoft Graphics Component
·MS17-012 Security update for Microsoft W…
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Unable to start Lync Server access edge service.

Unable to start Lync Server access edge service.
Recently I came across issue, were customer was unable to start Lync Server Access Edge service on any of their edge server. Recently they had Power Shutdown and all servers went down, all Front End services started however Lync access edge service not starting.
After power come up none of edge server access edge service starts.
I was thinking it may be because certificate expired or SQL service not started however certificate was valid with SAN names and it was properly installed and assigned as well. Also, all dependent services were running however still access edge service was not starting.