Polycom Trio 8800 unable to sign in to Skype for Business

Occasional Visitor

Polycom Trio 8800 unable to sign in to Skype for Business

I have a Polycom Trio 8800 that is unable to sign in to Skype for Business. It is an on-prem environment. Can anyone point me in the right direction? I have verified time settings, user/pw credentials. I can sign in to any other device using this account except the Polycom Trio 8800 phone. 

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Regular Advisor

Re: Polycom Trio 8800 unable to sign in to Skype for Business

You probably need to load your root certificates (internal and/public) onto the phone so that the trust to Skype is handled correctly.

Message 2 of 3
Polycom Employee & Community Manager

Re: Polycom Trio 8800 unable to sign in to Skype for Business

Hello @jescobar,

welcome to the Polycom Community.

It is always useful to include the currently used UC Software version as issues experienced or a question asked may already be addressed in a newer release.

This also allows yourself and others to check against current software release notes, Administrator Guides or FAQ post’s.

The above is also stated in the "Must Read First" and is the absolute minimum requirement every new post should include. .

In addition providing us with this basic information gives Polycom an idea what Software Versions are used in the field and avoids wasting time trying to troubleshoot issues which have already been addressed.

Therefore the Polycom VoIP FAQ contains this post here:

Question: How can I find out my SIP or UC Software Version of my Phone?
Resolution: Please check here


Check this:


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

Resolution: Have a look => here <=

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.


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 3 of 3