<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">No problem with IPV4 for years. Changed Yealink and Bria phones to IPV6, they still work fine including getting VM. But with IPV6 FS only sends a NOTIFY 1 out of ten times so the phones don't set MWI. A sip trace during registration shows everything identical between MWI and non-MWI working except that when MWI does work a NOTIFY is sent to the phone. The NOTIFY, <i class="">and only the NOTIFY</i>, references IPV4 addresses in “From, To, Message-Account” and I wonder if that may be the cause. I tried to change Message-Account to IPV6 but it gets truncated at the first colon, I opened jira <a href="https://freeswitch.org/jira/browse/FS-9428" class="">FS-9428</a> for that. I am wondering if this problem is one for Jira too or a config issue? Anyone run into this or have a suggestion? Thanks.</div><div class="">Mario G</div></body></html>