Microsoft Teams call to PSTN drops after WAN failover

[eyerule]

We have an issue with FortiGate SDWAN (running 7.0.10) when calling with Teams to an external number and failing over from WAN1 to WAN2. When we do a direct Teams call between Teams clients the call remains active when doing a failover from WAN1 to WAN2. But a call from a Teams client to an external number disconnects when failing over from WAN1 to WAN2.
Does anyone have the same experience? Is it maybe related to a SIP timer within Microsoft?

[Anthony_E]

Hello eyerule,

Thank you for using the Community Forum. I will seek to get you an answer or help. We will reply to this thread with an update as soon as possible.

Thanks,

[Anthony_E]

Hi eyerule,

I can see that reddit gives you the answer:

https://www.reddit.com/r/fortinet/comments/11tkyxc/microsoft_teams_call_to_pstn_drops_after_wan/

Regards,