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Hi, </div>
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there were a few critical things, here are the ones that caused me some headaches:</div>
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1) Gateway needs "contact-in-ping" set to true, otherwise Teams will reject OPTIONS </div>
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( Which does exist since freeswitch 1.10.3 as i understand, so pretty new. )</div>
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1.1) It takes a little time for Microsoft Teams to recognize the sbc to be active in their SBC Overview.</div>
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2) "sip-ip" and "ext-sip-ip" have to be set to the sbc-domain you use in Teams.</div>
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( Which is sort of strange, because in my profile configs it says "do not use domains", so ... we will see if that causes any trouble. Hasn't so far. )</div>
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3) TLS - we tried letsencrypt for a very long time, but it didnt work, so we got our certificate from godaddy, which works like a charm. </div>
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( I've read that others got it to work with letsencrypt, so it might just be my incompetence )</div>
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4) Debugging is sort of hard to do since communication with teams is encrypted.</div>
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Use "sofia profile xxx siptrace on" in fs_cli. Once you see the decrypted messages, Microsoft sometimes has useful Error-messages in their sip-responses.</div>
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We now have a fully compatible multi-tenant setup, which is sort of cool. </div>
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For this, you need at least 4 defined Gateways per customer ( at least one for the provider side, and three for teams, because they have three proxies ) but we used mod_lua to load the configuration dynamically, so thats managable.</div>
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But i can remember that there are some limitations when it comes to gateways.</div>
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Something like, you can have a maximum of 255 gateways. </div>
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Please correct me if im wrong here.</div>
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regards,</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>Von:</b> FreeSWITCH-users <freeswitch-users-bounces@lists.freeswitch.org> im Auftrag von Michal Bielicki via FreeSWITCH-users <freeswitch-users@lists.freeswitch.org><br>
<b>Gesendet:</b> Sonntag, 4. Oktober 2020 20:09<br>
<b>An:</b> FreeSWITCH Users Help <freeswitch-users@lists.freeswitch.org>; freeswitch-users <freeswitch-users@lists.freeswitch.org>; Matteo <mbrancaleoni@voismart.it>; David Horton <daveh@drachtio.org><br>
<b>Betreff:</b> Re: [Freeswitch-users] Microsoft Teams integration</font>
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