Darshanms,
To deploy a certificate by using Group Policy
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Open Group Policy Management Console.
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Find an existing or create a new GPO to contain the certificate settings. Ensure that the GPO is associated with the domain, site, or organizational unit whose users you want affected by the policy.
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Right-click the GPO, and then select Edit.
Group Policy Management Editor opens, and displays the current contents of the policy object.
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In the navigation pane, open Computer Configuration\Windows Settings\Security Settings\Public Key Policies\Trusted Publishers.
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Click the Action menu, and then click Import.
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Follow the instructions in the Certificate Import Wizard to find and import the certificate.
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If the certificate is self-signed, and cannot be traced back to a certificate that is in the Trusted Root Certification Authorities certificate store, then you must also copy the certificate to that store. In the navigation pane, click Trusted Root Certification Authorities, and then repeat steps 5 and 6 to install a copy of the certificate to that store.
Hi,
>>how to install certificate via GPO e.g i want to install certificate so how to install certificate to all workstations
Regarding this point, the following articles can also be referred to as reference.
Deploy Certificates by Using Group Policy
https://technet.microsoft.com/en-us/library/cc770315(v=ws.10).aspx
Configure Group Policy to Autoenroll and Deploy Certificates
https://technet.microsoft.com/en-us/library/cc947849(v=ws.10).aspx