Lync SIP messages - Event header

Registration:
Event: registration (REGISTER)

In-band provisioning settings:
Event: vnd-microsoft-provisioning-v2 (SUBSCRIBE, OK)

Information about contacts from contact list:
Event: vnd-microsoft-roaming-contacts (SUBSCRIBE, OK)

Presence:
Event: presence (SUBSCRIBE, OK)
Event: presence (NOTIFY, OK)
Event: vnd-microsoft-roaming-self (BENOTIFY)
SERVICE message has no Event header