Add https://cdn.jsdelivr.net/gh/marsteel/msft_teams_ruleset/Teams.yaml to your Clash config as 3rd-party rule-set.
Ports required for Microsoft Teams https://answers.microsoft.com/en-us/msteams/forum/all/ports-required-for-microsoft-teams/87c608b5-1650-4a84-a15a-9bd7846cb8bb
Usage https://lancellc.gitbook.io/clash/clash-config-file/rule-provider https://lancellc.gitbook.io/clash/clash-config-file/rules/rule-provider