Hi,

RFC3261 specifies in section 12.2 that a request inside a dialog may 
contain a Contact header that could update the remote target uri. In  
presence RFC3856 there is no specification if this should be possible in 
a presence dialog also.
My question is whether the remote target uri could be updated by a 
request inside the dialog in the following two cases:
1.  at the presence server by the Contact of a refresh Subscribe message
2. at the presence user agent by the Contact of a Notify message

Thanks and regards,
Anca Vamanu
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