topic MS Teams Aplication Performance Issue –Intermittently in Next-Generation Firewall Discussions

MS Teams Aplication Performance Issue –Intermittently

RoneyRajan123 — Thu, 13 Feb 2025 15:26:24 GMT

Hi Team,

We have received reports from three customers experiencing intermittent performance issues with the MS Teams application, specifically with audio and video not functioning properly.

Troubleshooting Steps Performed (Palo Alto Firewall):

✔ Removed all security profiles from the policy
✔ Configured QoS and assigned guaranteed bandwidth for MS Teams audio & video
✔ Applied application override for MS Teams and MS Team Audio and Video traffic
✔ Upgraded the firewall to the latest preferred release

Despite these actions, the issue persists. However, I have observed that clearing the session improves performance temporarily, which suggests a session-related problem.

Additional Information:

All three customers are using ADSL connections.

I suspect this may be related to session handling on the firewall. Please share your insights or recommendations on further troubleshooting.

@kiwi @Adrian_Jensen @ahameed @mshamamulla @paloalto

Re: MS Teams Aplication Performance Issue –Intermittently

mshekh — Fri, 14 Feb 2025 03:39:58 GMT

Hi @RoneyRajan123 ,

Recommendation is to open a support case and work with tac team to identify the issue and fix

Re: MS Teams Aplication Performance Issue –Intermittently

D.Martinez136027 — Fri, 14 Feb 2025 04:46:05 GMT

I’m experiencing the same issue since yesterday.

Please let me know if you find a solution. I plan to open a ticket tomorrow.

Re: MS Teams Aplication Performance Issue –Intermittently

RoneyRajan123 — Fri, 14 Feb 2025 16:16:46 GMT

Hi @D.Martinez136027

Please let me know what is the update from TAC, Actually, I have received complaints from 3 customers who are facing a similar issue.

Re: MS Teams Aplication Performance Issue –Intermittently

RoneyRajan123 — Sun, 16 Feb 2025 17:18:55 GMT

hi Team

anyone have any updates?

@D.Martinez136027

Re: MS Teams Aplication Performance Issue –Intermittently

emr_1 — Mon, 17 Feb 2025 01:31:34 GMT

https://status.paloaltonetworks.com/incidents/d3bs717c7yq8

Even this information is for prisma access, you might find the hints. If you are using decryption rules, bypass rule might help you.

Re: MS Teams Aplication Performance Issue –Intermittently

c_zellars — Tue, 18 Feb 2025 14:04:36 GMT

May be a bit late for some but this issue turned out to be with Microsoft pushing certs with a broken cert chain. In the Decryption logs you can search for

(err_index eq Certificate) and ( root_status eq 'untrusted' ) For our case it was with the following ( issuer_cn eq 'Microsoft Azure RSA TLS Issuing CA 08' ). We contacted MS and they fixed the cert issue on their side. Another option would've been uploading and trusting the cert in Panorama and pushing to devices but that of course could lead to other issues such as if the cert was compromised or revoked and then we would sit there with that bad cert if we didnt catch it in time.