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WARNING: Request-CSCertificate failed – Lync 2013

Installing Lync 2013 Server or Skype for Business – Getting error “Warning: Request-CSCertificate failed”

When deploying Skype for Business / Lync server in my lab, i got an error “Warning: Request-CSCertificate failed” in the step where we have to request for a certificate.

Login to Certificate Authority (CA) Server :

To troubleshoot and resolve the issue, I simply logged into my CA server and made the following changes:

  • Login to Windows CA Server
  • Go to Run and type “certsrv.msc”
  • Right Click CA server and click on
  • Click on Security tab
  • Select the Username that you are using while installing the Lync Server. I was using Administrator in my lab server and hence i selected Domain\ 
  • Checkbox “Request Certificates” and click on Apply and OK.
  • Re-run the “Request” certificate wizard and the issue should be resolved.

That’s all, i hope this helps!

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Electrical Engineer CCNA Collaboration CCNA Voice CCNA R&S. I'm Electrical Engineer and I work like Support Engineer for a Telephony Service Provider Company. Before that I had position like Pre-Sale Engineer about small and medium multivendor telephony solutions. I have 5 years of experience working in Telephony Multivendor Projects. I am also 3 years of experience working in Support and implementation about Cisco Collaboration platforms: UCS server, UCM, Cisco Unity, Presence Server, Jabber, Gateway. Support Community is most useful in finding design, implementation and support tricks and shortcuts that greatly help me in my daily activities. If you need to contact me, please you can writte me.


CCNA Routing and Switching
Am a technology enthusiast. I work in network support providing support with implementation, maintaining and precisely troubleshooting the infra.
Realm of collaboration makes me want to learn and face new challenges more and more.