Certificate Not Valid While Installaing LYNC2010 SERVER

Dear Experts,

Thanks in advance. While Installing Lync2010 in my lab environment I stocked in creating certificates on Lync server 2010.

I followed this link and as the instruction I did and I am sure I have not done any mistake.


My Lab Setup

LYNC-DC-Windows2008R2, AD DS, DNS, AD CS

LYNC-SVR- Windows 2008R2  Front end ,Back end

When requesting the Certificate I get the following message:


A Certificate with thumbprint " 3E76ED3EC12XXXXXXXXXXXX has been added to the local certificate store.

The certificate has been issued by the online certification authority and is installed to the local certificate store, however it is not valid.  Make sure that the Root certificate, and necessary certificate chain is installed on this server.

I am requesting you please help me out..
JJ KRWindows System administratorAsked:
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David Johnson, CD, MVPOwnerCommented:
these days most certificate authorities use a subordinate CA to issue certificates
root ca
---- subordinate ca
--------- sub-subordinate ca
-------------- your certificate
You need all of these certificates except for yours in the trusted root provider store.
godaddy/starfield https://certs.godaddy.com/repository
digicert  https://www.digicert.com/digicert-root-certificates.htm
startssl https://www.startssl.com/certs/
Verisign Root Cert. https://access.ca.gov/Certs/VeriSign_Class_3_Public_Primary_Certification_Authority_-_G5.crt
Verisign Intermediate Cert. https://access.ca.gov/Certs/VeriSign_Class_3_Secure_Server_CA_-_G3.crt
JJ KRWindows System administratorAuthor Commented:
Dear David,

Thanks for your comments.
There are lots of certificates as I mentioned below. Which File need for download

DigiCert Assured ID CA-1
DigiCert Assured ID CA G2
DigiCert Assured ID CA G3
DigiCert Assured ID Code Signing CA-1
DigiCert EV Code Signing CA (SHA2)

JJ KRWindows System administratorAuthor Commented:
Dear David,

I am in Lync Server 2010 Deployment wizard  where I have finished step 1: Install local configuration store completed

Step:2  Setup or Remove Lync Server  Components completed.

Step 3: Request, Install or Assign Certificates  Not completed . I am stuck in step no 3. Certificate Wizard . Which option I have to select ?
Import Certificate.

Please suggest....
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David Johnson, CD, MVPOwnerCommented:
you can download and install all of the certificates except for the code signing intermediates.  Digicert has 2 free utilities to check your certificate chain. basically you have to examine the certificate chain and get the certificate that matches the one higher than the one you are looking at. Look for the issued by line .. use certmgr.msc to do this

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JJ KRWindows System administratorAuthor Commented:
Dear David,

You are genius. Thanks a lot for your time and support. After installed all these required certificates the Issue resolved. I installed successfully LYNC2010 in my lab. Thank you so much.

Biswajeet Pattnaik
JJ KRWindows System administratorAuthor Commented:

As per the instruction of David Johnson, MVP issue resolved
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Windows Server 2008

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