Cannot sign into VVX601 with BToE

Occasional Contributor

Cannot sign into VVX601 with BToE


-O365 w/ MFA enabled

-Windows 10 64bit

-Skype for Business 2016 (16.0.9126.2259 32bit)

-BToE version

-Polycom VVX601

-UC Software (also tried with with and a newer BToE version)

-IP Mode: IPv4

-Connection type: Wall to phone, phone to PC


I cannot seem to sign into my Polycom phone with BToE if my account has MFA enabled. When I sign into Skype, Skype asks for my password to pass to the phone and after I type it in, the phone tries to sign in (it says signing in as ...) but it times out. I can sign into my phone via web sign-in, but I want to use BToE. BToE on both my computer and phone says that it is paired.


I setup an app password on my account, signed into Skype but it still would not sign into the phone. When I type in my app password, the phone fails out quickly and gives me an error ("Skype for Business authentication failed. Sign in again"). I then proceed to type my password and again, it sits and hangs.


I created a dummy account without MFA, signed into Skype and BToE signed me into the phone no problem.


Thanks for your help in advance.



Message 1 of 3
Polycom Employee & Community Manager

Re: Cannot sign into VVX601 with BToE

Hello @JFesta16,

welcome to the Polycom Community.

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


Apr 27, 2018 Question:Does Polycom support Modern Authentication on Polycom phones?

Resolution: Modern Authentication ADFS is only supported via Web Sign-In

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.
Polycom employee participation within this community is not mandatory and any post or FAQ article provided by myself is done either during my working hours or outside working hours, in my private time, and may be answered on weekends, bank holidays or personal holidays.
Message 2 of 3
Occasional Contributor

Re: Cannot sign into VVX601 with BToE

Hello @SteffenBaierUK,


Thank you for your response.


Just to be clear, Microsoft MFA (at least how we set it up) does not involve AD FS. However, is this a blanket statement that Polycom phones do not support modern multi factor authentication of any kind?




Message 3 of 3