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I have a problem with VVX (411 and 501) & Trio 8800 devices signing out of Skype for Business when the FTP Provisioning server is operational.


The provisioning server is based on FileZilla FTP server and I'm using Trio firmware and UCS version on the VVX devices.


Provisioning new devices works as expected, firmware upgrade is completed the the base line configuration occurs.  I'm using the same provisioning server for both devices using the following option in the master configuration file.




We manually sign into Skype for Business on the VVX devices using PIN Authentication and with User Credentials on the Trio devices.  With the Filezilla Server running post deployment, we noticed that the devices signout of Skype for Business typically within 24 hours.  This occurs for the majority of devices - not all of them.  Note I have disabled the Signout button on the Trio and VVX devices to remove the case of users to accidentially press the button.


A colleague suggested that I stop the Filezilla FTP service and since I have done this we have not had a sign-out instance for the past 5 days.


Does anyone have any suggestions on what might be the cause or what further troubleshooting I can perfom to resolve this issue as I don't want to have to manually start the FTP server everytime we need to provision a phone


Thanks in advance



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Hello GMcClintock,

welcome back to the Polycom Community.

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 <=


Not posting any logs will not give us a clue what the issue may be.


We need logs to troubleshoot anything and in order to speed this up you want to raise this with support.


In order to raise a support ticket you need to work with your Polycom reseller as they need to do this for you. End Customers are usually unable to open a ticket directly with Polycom support.

If this is some sort of an Internet discounter please post either your phone's MAC address or your Polycom devices serial so I can look up who would be able to support you. This may not be who you purchased the Polycom device from.

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

Notice: This community forum is not an official HP Poly support resource, thus responses from HP 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 support channels.
Please also ensure you always check the General VoIP , Video Endpoint , UC Platform (Microsoft) , PSTN
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