VVX310-Skype for Business sign in failed

Frequent Visitor

VVX310-Skype for Business sign in failed

Good afternoon


I am having a problem where i cannot login a Skype for Business account on a VVX310 i have setup for testing. i tried logon from the web page and get an error saying "Skype for Business Sign in Failed". The phone firmware was just upgraded from 5.5.3  to


Skype/Lync is on premise and version is Lync2013 servers.

Phone info:

Model: VVX310

UC Software version:



Base Profile: Skype for Business
Web Server: Enabled
Web Config Mode:HTTPS


I have attached the app logs from the phone.


Thank you


Polycom Employee & Community Manager

Re: VVX310-Skype for Business sign in failed

Hello @Kola,

welcome to the Polycom Community.


Has this ever worked or is this a new installation?

The community's Skype for Business FAQ contains this post here:

Jan 17, 2017 Question:How can I troubleshoot simple Skype for Business, LYNC or Office365 issues?

Resolution: Have a look => here <=

I can see some SSL errors in the logs so most likely its a Certificate issue.

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

Please be aware:

The purpose of these forums is to allow community members collaborate and help each other.
Questions posted here do not follow Polycom’s SLA guidelines.
If you require assistance from Polycom technical support, please open a
web service request or call us .

The above is necessary in order to track issue internally within Polycom.

You are welcome to post more questions or configuration or logs for other community members to look at but if your issue requires a fix via Polycom you must go via the official support structure.

Please ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's

Please remember, if you see a post that helped you , and it answers your question, please mark it as an "Accept as Solution".

This forum reply or post is based upon my personal experience and does not reflect the opinion or view of my employer.
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Message 2 of 4
Frequent Visitor

Re: VVX310-Skype for Business sign in failed

Hi Steffen


It has always worked until i did the upgrade to to 5.7.2. i am not sure what to look for in the app logs that would point me to the issue.

Message 3 of 4
Frequent Visitor

Re: VVX310-Skype for Business sign in failed

So thanks to your troubleshooiting FAQ. I was able to find what the issue was.

The phone was looking for lyncdiscoverinternal.domain.com in DNS. there was no A record for lyncdiscoverinternal. i went ahead and created the record on my internal DNS server and the sign in completed successfully.

0711154401|curl |3|00|timeout on name lookup is not supported
0711154401|curl |3|00|getaddrinfo(3) failed for lyncdiscoverinternal.domain.com:80
0711154401|curl |3|00|Couldn't resolve host 'lyncdiscoverinternal.domain.com'
0711154401|curl |3|00|Closing connection #0

****************************HTTP SEND**************************

0711154401|nisvc|2|00|HTTP SEND:: DestUrl(http://lyncdiscoverinternal.domain.com), HttpResCode(0), curlRetCode(6) retVal(0)
0711154401|nisvc|2|00|ErrorBuffer::Couldn't resolve host 'lyncdiscoverinternal.domain.com'

Message 4 of 4