Poly OS 4.0 Microsoft Teams


Poly OS 4.0 Microsoft Teams

Does anyone know why Microsoft seemed to pull the 4.0 release?  In the teams admin portal it's now showing that the firmware should be vs for all my X Studios, X30, X50 and X70.  I know you can't downgrade them, just curious if anyone is seeing this since last week?


Re: Poly OS 4.0 Microsoft Teams

interesting! i'm seeing the same today as well, but definitely not the case between last Fri and yesterday, inclusive, b/c i had pushed the update to v4.0 using TAC on 1-2 systems per day everyday since last Friday. now, i can't--not through TAC anyway. hmm, wonder what's up... 

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Polycom Employee & Community Manager

Re: Poly OS 4.0 Microsoft Teams

Hello @alchemy & @swinterstorcon ,


Welcome back to the Poly Community.


Our Partner Microsoft has found a technical issue in their distribution and checking the minimum software version before the PolyOS 4.0 upgrade. They therefore decided to remove PolyOS 4.0


Just as a reminder as outlined in multiple sources:


  • PolyOS 4.0 must only be installed on Systems that have at least 3.14.x installed
  • PolyOS 4.0 cannot be downgraded
  • At present PolyOS 4.0 is not offered as an automatic update and can only be installed using PolyLens and/or downloaded from our support page and installed via a local WebServer or via USB

The best and quickest way forward is to contact our Support organization as the community is run by volunteers only.

I am closing this post as I explained the reason and prerequisites before installing PolyOS 4.0

Best Regards

Steffen Baier


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.


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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.
Please also ensure you always check the VoIP , Video Endpoint , Microsoft Voice , PSTN or other FAQ's in the different sections
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