Technical Tip: Microsoft Teams calls dropping

[HiralShah]

Description	This article describes that Microsoft Teams calls are dropping only behind FortiGate.
Scope	FortiGate.
Solution	Users are having issues with Microsoft Teams calls dropping only behind FortiGate. Check for LAN to WAN policy: Microsoft Teams uses UDP port 3478-3481 for communication. Add service with the same ports and UDP: If still facing an Issue with Call Drops on a Specific ISP, take sniffer Packets for MS Teams: diagnose sniffer packet any " src net 52.0.0.0/8 and portrange 3478-3481" 6 0 l Check the MSTeam traffic using which network subnet from Forward traffic, and set it to/8 subnet. Example: 52.0.0.0/8 is an MS-TEAM Subnet Network. Note: Make sure the DOS policy is not dropping the packets, as Microsoft Teams uses UDP packets, which might be getting dropped by the UDP threshold configuration; therefore, lower the threshold value for the UDP traffic. Related article: Troubleshooting Tip: The most common issues with FortiGate and Microsoft Teams