Hi all,

    When the 401 resp of Register has "Supported:outbound", can UAC
assume that the server has outbound support. Or, should it wait for 200 Ok 
resp?

Below is an excerpt from RFC 5626.
   The UAC examines successful registration responses for the presence
   of an outbound option-tag in a Require header field value.  Presence
   of this option-tag indicates that the registrar is compliant with
   this specification, and that any edge proxies which needed to
   participate are also compliant.

Best Regards,
Mohammed Hanifa 

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