TC8 controllers keeps disconnecting from X50 and X30 Bars

[Dan7500]

We have recently run into issues with our Poly X50 and X30 Teams Rooms systems where the TC8 controllers keep disconnecting from the bar. We get a circle in the middle that says "Trying to Connect" and it never does. 

We have updated all the latest firmware of the bar and TC8. 

Bar info from MS Teams Room Admin;

Teams Admin Agent

1.0.0.202507210031.product

Up to date

Firmware

4.6.1.444241

Up to date

OEM Agent

7.6.1-SNAPSHOT

Up to date

Teams

1449/1.0.96.2025328903

Up to date

Authenticator

6.2505.3166

Up to date

Microsoft Intune

25.02.1

Up to date

TC8 Information from MS Teams Admin;

Teams Admin Agent

1.0.0.202507210031.product

Up to date

Firmware

6.6.1.7001752

Up to date

OEM Agent

7.6.1-SNAPSHOT

Up to date

Teams

1449/1.0.96.2025328903

Up to date

Authenticator

6.2505.3166

Up to date

Microsoft Intune

25.02.1

Up to date

Troubleshooting;

Reset TC8 - Issue keeps happening

Reset Bar - Issue keeps happening

Reset both Bar and TC8 - Issue keeps happening

Reset both Bar and TC8. Also deleted both in Teams Admin - Issue keeps happening

Reset both Bar and TC8, deleted both in Teams Admin and set daily reboot in Poly Admin of each device. 

What have we missed? 

[SteffenBaierUK]

Hello @Dan7500 ,

Welcome to the HP Poly community.

Is this a dark screen Microsoft Teams screen or a white Poly OS screen?

Best Regards

Steffen Baier

[Dan7500]

It is a dark screen with the signed in account name in the upper right-hand corner and a blue circle in the middle. It eventually fails and says failed to connect. 

[SteffenBaierUK]

Hello @Dan7500 ,

Anything around Microsoft Teams pairing should be consulted with our Partner Microsoft. Microsoft Pairs over the internet, so there could be firewall issues etc.

Or is this using a Proxy?

Best Regards

Steffen Baier

[Dan7500]

We are not using a proxy and this is a dedicated VLAN for our Teams Rooms devices with no changes to the firewall. 

I can update that after the weekend, the bars have seemed to stabilize.  All TC8s are connected and have stayed that way for a couple of days now. Also, I notice that MS released an update to the Authenticator App for the devices and I am slowly getting them updated (a couple at a time to ensure no new issues).  

The reason why I asked this community is because in the firmware release notes for both 4.6.0 and 4.6.1 (which our Teams Admin shows 4.6.0 for these devices) Known Issues - Device management - PVENG-7684 - On a Poly Studio X video bar in Teams mode with a connected Poly TC8 touch controller, the system may show as offline in Teams admin center and unpair with the controller.

I had already applied the workaround, so I was seeing if anyone else had seen this too.  Not sure if that was a MS issue being worked on or a Poly issue since it was documented in the Poly release notes.