Configure SIP security mode


When Lync connects to the server, it supports various authentication mechanisms. This policy allows the user to specify whether Digest and Basic authentication are supported.

Disabled (default): NTLM/Kerberos/TLS-DSK/Digest/Basic
Enabled:
Authentication mechanisms: NTLM/Kerberos/TLS-DSK
Gal Download: Requires HTTPS if user is not logged in as an internal user.

Supported on: At least Windows 7
Registry HiveHKEY_CURRENT_USER
Registry Pathsoftware\policies\microsoft\office\15.0\lync
Value Nameenablesiphighsecuritymode
Value TypeREG_DWORD
Enabled Value1
Disabled Value0

lync15.admx

Administrative Templates (Computers)

Administrative Templates (Users)