RPC Proxy Authentication Setting

Supported on: At least Windows Server 2008 R2 or Windows 7

Registry

HKCU software\policies\microsoft\office\16.0\outlook\rpc

Options

proxyauthenticationservice enum
  • Basic -> 1
  • NTLM -> 2
  • Negotiate -> 16
  • Certificate -> 65536

Description

This policy setting determines the RPC proxy authentication setting for Outlook Anywhere. If you enable this policy setting, you can specify the proxy authentication setting that Outlook uses, and this overrides any proxy authentication setting specified in Autodiscover. If you do not configure this policy setting Outlook uses the proxy server authentication specified in Autodiscover.