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UPN + GROUP + UPNEXPAND question.

Within the context of groups, when do you get MULTIPLE UPNs?
There was talk that you MUST do a UPNEXPAND each time you
authenticate? Seems a silly to have an extra round trip.
Why not do it as part of the authentication reply?

Then I still do NOT know what you do with them. At what point
does the CUA ever pass them back to the CS? If never, then
what's the point?

Perhaps those of you that understand UPN's can send some text or
email describing when you get them? The current CAP draft and
the text from Paul (I think it was from Paul) does not seem to say.

I think Bruce says they comeback as part of the authentication reply?
Yet no one that proposed any new text has replied to that question.
And I can't find any text that says that.

There was no proposed changes to the ABNF or any text, or any example
in CAP-draft that shows when you get them, other than UPNEXPAND.

As I understoon groups of calendars, it was meant to be something like:
If you happen (at run time) to be part of group-A, and there is
a calendar that has modify permission to cal-group-a, then you
can modify that calendar. So why does the CUA ever need to know
the UPN of group-A ? 'user' has or does not have permission
to modify cal-group-a. Why does the CUA care what the value
of the UPN property is that allowd that? Why can't it just
work, or you get permission denied?

I still don't get it :-)

Would it be something like:


   C: AUTHENTICATE <user> <password>
   S: 2.0
   S: .
   S: Content-Type:text/calendar; method=REQUEST; charset=US-ASCII
   S: Content-Transfer-Encoding: 7bit
   S:
   S: BEGIN:VCALENDAR
   S: PRODID:-//ACME/CAPserver//EN
   S: VERSION:2.1
   S: CAPVERSION=1.0
   S: ITIPVERSION=1.0
   S: AUTH=KERBEROS_V4
   S: AUTH=DIGEST_MD5
   S: CAR=CAR-FULL-1
   S: MINDATE=19700101T000000Z
   S: MAXDATE=20370201T000000Z
?  S: UPN=user
?  S: UPN=group-A
   S: END:VCALENDAR
   S: .
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