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cx600 can't sign cloud pbx account

Occasional Advisor

cx600 can't sign cloud pbx account

Base on the new , cloud pbx should support version version 4.0.7577.4463.


We have upgrade to this version and test it can't sign in throught USB. But USB is only one method to login.

Credential like below screen.


cx600 screen pending on connecting to Lync Server... 


Any advise?




Polycom Employee & Community Manager

Re: cx600 can't sign cloud pbx account

Hello thyhk215,

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. My official "day" Job is 3rd Level support at Poly but I am unable to provide official support via the community.


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
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