MWI was previously working great on my system, but starting (I think) with an 
update to 4.4 a week ago, I have stopped seeing MWI, at least for some users.

As shown in the proxy log snip below, when this user "101" tries to subscribe, 
the request is denied, but then it is retried and it succeeds.  But no message 
light appears on either Polycom phone nor on Linksys ATA2102, booth of which 
used to work fine.

Any suggestions for how to resolve or troubleshoot?

Thanks,

Jeff

"2011-09-20T18:15:56.213847Z":1373862:INCOMING:INFO:choicevoip.ev.ithaca.ny.us:SipClientUdp-12:4015A940:SipXProxy:"Read
 SIP message:\n----Local Host:192.168.48.2---- Port: 5060----\n----Remote 
Host:192.168.48.2---- Port: 41601----\nSUBSCRIBE 
sip:[email protected];x-sipX-nonat SIP/2.0\r\nFrom: 
<sip:[email protected]:41601>;tag=csEl6b\r\nTo: 
<sip:[email protected];x-sipX-nonat>\r\nCall-Id: kzlBacog8Zdd09\r\nCseq: 1 
SUBSCRIBE\r\nContact: <sip:192.168.48.2:41601;transport=udp>\r\nEvent: 
dialog\r\nAccept: application/dialog-info+xml\r\nExpires: 2725\r\nDate: Tue, 20 
Sep 2011 18:15:56 GMT\r\nMax-Forwards: 20\r\nUser-Agent: sipXecs/4.4.0 
sipXecs/rls (Linux)\r\nAccept-Language: en\r\nVia: SIP/2.0/UDP 
192.168.48.2:41601;branch=z9hG4bK-XX-f6c9vNcbdolbwDO6agRXhK7T6Q\r\nContent-Length:
 0\r\n\r\n====================END===================="

"2011-09-20T18:15:56.216093Z":1373863:AUTH:INFO:choicevoip.ev.ithaca.ny.us:SipRouter-17:4284E940:SipXProxy:"SubscriptionAuth[205_subscriptionauth]::authorizeAndModify
 challenging subscription for dialog event package 'dialog' (call id = 
'kzlBacog8Zdd09')"

"2011-09-20T18:15:56.216132Z":1373864:AUTH:INFO:choicevoip.ev.ithaca.ny.us:SipRouter-17:4284E940:SipXProxy:"SipProxy::proxyMessage
 authoritative authorization decision is DENY by 205_subscriptionauth for 
kzlBacog8Zdd09"

"2011-09-20T18:15:56.216952Z":1373865:OUTGOING:INFO:choicevoip.ev.ithaca.ny.us:SipRouter-17:4284E940:SipXProxy:"SipUserAgent::sendUdp
 UDP SIP User Agent sent message:\n----Local Host:192.168.48.2---- Port: 
5060----\n----Remote Host:192.168.48.2---- Port: 41601----\nSIP/2.0 407 Proxy 
Authentication Required\r\nFrom: 
<sip:[email protected]:41601>;tag=csEl6b\r\nTo: 
<sip:[email protected];x-sipX-nonat>;tag=NpjUOU\r\nCall-Id: 
kzlBacog8Zdd09\r\nCseq: 1 SUBSCRIBE\r\nVia: SIP/2.0/UDP 
192.168.48.2:41601;branch=z9hG4bK-XX-f6c9vNcbdolbwDO6agRXhK7T6Q\r\nProxy-Authenticate:
 Digest realm=\"ev.ithaca.ny.us\", 
nonce=\"06bcc68481069ed6a4b8f8bd1d882ffb4e78d85c\", qop=\"auth\"\r\nServer: 
sipXecs/4.4.0 sipXecs/sipXproxy (Linux)\r\nDate: Tue, 20 Sep 2011 18:15:56 
GMT\r\nContent-Length: 0\r\n\r\n--------------------END--------------------"

"2011-09-20T18:15:56.221812Z":1373866:INCOMING:INFO:choicevoip.ev.ithaca.ny.us:SipClientUdp-12:4015A940:SipXProxy:"Read
 SIP message:\n----Local Host:192.168.48.2---- Port: 5060----\n----Remote 
Host:192.168.48.2---- Port: 41601----\nSUBSCRIBE 
sip:[email protected];x-sipX-nonat SIP/2.0\r\nFrom: 
<sip:[email protected]:41601>;tag=csEl6b\r\nTo: 
<sip:[email protected];x-sipX-nonat>\r\nCall-Id: kzlBacog8Zdd09\r\nCseq: 2 
SUBSCRIBE\r\nContact: <sip:192.168.48.2:41601;transport=udp>\r\nEvent: 
dialog\r\nAccept: application/dialog-info+xml\r\nExpires: 2725\r\nDate: Tue, 20 
Sep 2011 18:15:56 GMT\r\nMax-Forwards: 20\r\nUser-Agent: sipXecs/4.4.0 
sipXecs/rls (Linux)\r\nAccept-Language: en\r\nProxy-Authorization: Digest 
username=\"~~id~sipXrls\", realm=\"ev.ithaca.ny.us\", 
nonce=\"06bcc68481069ed6a4b8f8bd1d882ffb4e78d85c\", 
uri=\"sip:[email protected];x-sipX-nonat\", 
response=\"1892f617134b74c5fff46921fa7800a2\", cnonce=\"c8vmf_\", qop=auth, 
nc=00000001\r\nVia: SIP/2.0/UDP 192.168.48.2:
 41601;branch=z9hG4bK-XX-f6cciZzA3JSkE6KjjOCSnQ42Yg\r\nContent-Length: 
0\r\n\r\n====================END===================="

"2011-09-20T18:15:56.224589Z":1373867:AUTH:INFO:choicevoip.ev.ithaca.ny.us:SipRouter-17:4284E940:SipXProxy:"EnforceAuthRules[400_authrules]::authorizeAndModify
  no permission required for call kzlBacog8Zdd09"

"2011-09-20T18:15:56.224631Z":1373868:AUTH:INFO:choicevoip.ev.ithaca.ny.us:SipRouter-17:4284E940:SipXProxy:"SipProxy::proxyMessage
 authoritative authorization decision is ALLOW by 400_authrules for 
kzlBacog8Zdd09"
"
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