Microsoft Lync Client Certificate Installation Steps
Copy certificate chain from one of the working machine to the affected machine,
![](https://lh3.googleusercontent.com/Rm9gOxGHoOxIjZxzgNNvczDYPX23xgZ5_Ah8VAHblxIel1R9m7F6K8bBqSjOICavI2zPhUzDGfzOq9g0ztTlZYgxiOWuZgh7d0X-4JzFuJv02RmwqnE)
![](https://lh6.googleusercontent.com/oHcxmHaSwzKH8rUJnAVW_cVw9izkT0AIAY5AwW6kzDmHO2iRCbE9kOxw_sxbLKvSoHe8akCjbcv3KXnY2sd8Hz2uPSBZ3x0SnqeA2OEgQmL93YeyY1k)
![](https://lh6.googleusercontent.com/BsJ98QdYOc9JQjFULigDiQfQUBgDJzDPCGdCVSlwdiyQQJRAxQWQVhneNcIac44UROx2wEgozhrftKQrYkfRFOKspbL10t8u1v7lBrPF2cCdWe6MpJE)
![](https://lh5.googleusercontent.com/DXWjFxEcNphWd2hC5nYztsSDar5tP8fqqp-c6i9Vco1OGYl7A4FvrUfdskmMNY4yq5JRXrRJVlmDnz0p3wJlkWAIj4QFghxwLf6D4lmUEkphyH3wA9Y)
![](https://lh4.googleusercontent.com/nPZ4baNN7mAQlQSqWyi4VGJ2H_B4ggglhahs7d9oXs-ES0zWG3viIMfrAcSaYwYLbqKRcJ_efKub8B_3GCsrEaatmoS99OMJ-O0kJN5x0szVMk0WkRc)
![](https://lh6.googleusercontent.com/YvhlOH-b8xSaDPhgp7vZQ9f_ggX2tuSHlYFOGG683Sq_y5ixO35cFKn6Z6zzlbinjJyILIXMt7jllxbJXmhuKZpaL4OWC2MzCFtHdLRMMBEkqpiVINo)
![](https://lh4.googleusercontent.com/2yRcITEpTA-O50dJbwuFrqQmQ4p1DUtFA8c8U4EQ8oGLLYjo4-NGjbh2h6iszq0zdFaEcZENOv4ZbH2QAJBQRCsAm06wFXGmufNLldiwL426pGQIHnI)
![](https://lh4.googleusercontent.com/ORZuyPFRRQPwUcturKp3lIGx9s8Pxpaj6gXUzvLXYvWU2rYEmTu2WVb8Vcon6gyUH5QW8IxVr4X7OMaV3Mswk91Jq8FO1dZWo6qpDGOF1yONVC8VYjw)
![](https://lh5.googleusercontent.com/u7MAKCYcxFWgF6IXHjBIIwoyjFKKIm_nuy9afryycEy7imXzE80Hz7YCCSX3iYFU_wXmMgagItp1tQ3IsBttp74FwnWMoamcLeYnESpyBZRLws4aWz8)
![](https://lh6.googleusercontent.com/OzRjxX5-sXSgi2XGrbNLJyhfvup-H78bz1AWznAxgVqv8CJW17ynjaDTbirQVUbfUbrE-B_DDbDPyyajDqKKsOeyhCkiVWOS4wNegqh_LulYS5oS2zk)
![](https://lh4.googleusercontent.com/t7IUoTg_DFAGHPRWK6WIvO_0bcnCfb4wMZ1QMtab5RrEPnFQC-Y7P-eNKD9pE9J8X0xGs9isX0C2GggP5dG42gTc-fDF5aaLCSmb4Z7jp673SNbFkvI)
![](https://lh5.googleusercontent.com/yckycFzlSvDEjwvtoXS5yLjVQXPb10YiIv1bP3oneKsOb3p5f_-vMgMb6STIm3op3h0Qt9k1cjKNFsfFEbwNFcTHmn-qFNQA-hWU5uDLVxlckp7VbYQ)
- Now install certificate chain in trusted root. Double click on the Microsoft Lync certificate & click on “Install Certificate”
- Click on “Next”
- Click on “Place Certificate in the following store” & click on “Browse”
- Select “Trusted Root Certification Authorities” location to store Lync certificate & click OK.
- Click on “Next”
- Click on “Finish”
- Click on Yes to install this certificate.
- Try to login to the Lync client…
If it fails try below options,
- Open Lync client & click on options icon & select Tools->Options as shown below
- Click on Advanced tab
- Select Manual Configuration & add Internal Lync Server name or ip address IP Address of Lync Server & click on OK
- Now enter your username & password (e.g. santosh.s@doamain.name ) & click on Sign In