TCP 443 – 0365 Portal, Outlook, OWA, Sharepoint Online, Lync client, ADFS Federation / Proxy
TCP 80/443 – Azure AD Syn Tool, Mail Migration Tool, Exchange
TCP 25 – Mail Routing
TCP 587 – SMTP Relay
TCP 143/993 – IMAP Simple Migration Tool
TCP 995 – POP3(S)
TCP 5223 – Lync Mobile client push notifications
PSOM/TLS 443 – Lync Online Outbound Data Sharing
STUN/TCP 443 – Lync Online Outbound audio, video, app sharing
STUN/UDP 3478 – Lync Online Outbound audio and video sessions
UDP 20000-45000 – Lync to Phone Outbound
UDP 50000-59000 – Lync Outbound audio and video sessions
