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CX3000 Sign in error

Occasional Contributor

CX3000 Sign in error

Hello, Trying to get a CX3000 to work and all I get is Sign-in Error: Cannot download certificate becasue domain is not accessible. If the problem continues, contact your support team. 


I'm doing the setup via the USB to my PC running Skype for Business 2015. I suspect my issue is we actually use a hosted Lync service provided by a Compnay called Arkadkin, however I am not sure how to get past the error. 

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Message 1 of 2
Polycom Employee & Community Manager

Re: CX3000 Sign in error

Hello mholt,


welcome back to the Polycom community.

Polycom and other manufacturers produce these optimized for Microsoft® Lync® devices after a reference design and the embedded OS running on the phones is provided, supported and maintained by our partner Microsoft®.

You therefore may want to reach out to the Microsoft® community and / or Microsoft® support directly instead as this is the most direct and efficient path.

Please try here


Best Regards

Steffen Baier

The title Polycom Employee & Community Manager is a community setting and does not reflect my role. I am just a simple volunteer in the community like everybody else. All posts and words are my own & do not represent the views of Employer.


Notice: This community forum is not an official Poly support resource, thus responses from Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge. If you need immediate and/or official assistance please open a service ticket through your proper support channels.
Please also ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's
Message 2 of 2