Polycom HDX wont register with lync 2013

Occasional Contributor

Polycom HDX wont register with lync 2013

Im getting errors in the event logs on the lync server, saying the certificate from the IP of the HDXunit is invalid. how to i fix this?

Message 1 of 3
Polycom Employee & Community Manager

Re: Polycom HDX wont register with lync 2013

Hello James,

welcome to the Polycom Community.

It is always useful to include the currently used software version as issues experienced may already be addressed in a newer release.

This also allows yourself and others to check against current software release notes.

In addition please be aware that the HDX is only LYNC qualified and requires a RTV license on the HDX.


You should simply follow the Polycom® Unified Communications Deployment Guide for Microsoft® Environments
 => here <= and please be aware that you must enable NTLM on your Microsoft Lync or Office Communications Server.

Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.

Best Regards

Steffen Baier

Polycom Global Services


If official support is required please check how to phone or open a case here

The title Poly 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.


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Message 2 of 3
Occasional Contributor

Re: Polycom HDX wont register with lync 2013

hi thanks for that.


ive checked ntlm is enabled on the lync server and have checked over the settings in the document and they all seem ok.

hdx software is 3.1.5

lync is 2013 oct 2013 cu


this is the error:


Multiple invalid incoming certificates.

In the past 31 minutes the server received 60 invalid incoming certificates. The last one was from host 10.x.x.x
Cause: This can happen if a remote server presents an invalid certificate due to an incorrect configuration or an attacker.
No action needed unless the number of failures is large. Contact the administrator of the host sending the invalid certificate and resolve this problem.

Message 3 of 3