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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


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 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