Thomas.Poett@TEAMS (MVP Teams and Cross-Tenant Migration Specialist)

How is the SIP URI defined in Skype for Business Online? Can the SIP URI be changed? - Yes! I ran into an issue today, where we have registered an additional DNS Domain with the customer Office 365 tenant. Problem was, the UPN and EMAIL address was still @xx.onmicrosoft.com It was necessary changing the SIP address to the new domain. the User had: sip:      user@xx.onmicrosoft.com email   user@xx.onmicrosoft.com UPN    user@xx.onmicrosoft.com but we need to change actually only the SIP address to user@newdomain.com the command Set-CsUser -identity user -SipAddress sip: user@newdomain.com is not working! ERROR: Unable to set “SipAddress”. This parameter is restricted within Remote Tenant PowerShell. see support statement: https://support.microsoft.com/en-us/kb/2909916 ------------------------------------------------------------------------- What is important in Office 365 AZURE AD? First activation of the ...

This should be just used as basic approach on how you can support busy on busy. First you can check if the new APPLICATION was installed correctly: The newly created appliance will be loaded during the Frontend server startup procedure and you will be able seeing a not in Event 30253 , indicating the application was included in the loading process. Next important, not to say most important tool ist LOGGING TOOL : Here you will find a pre-defined set towards busy on busy. Generally busy on busy messages look like this example below: Content-Length: 0 Via: SIP/2.0/TLS 192.168.0.13:49887;received=103.12.145.113;ms-received-port=41538;ms-received-cid=9F6B100 From: "User1"<sip:user1@westconlab.com>;tag=8ea09bf2e6;epid=2983f4c267 To: <sip:user2@westconlab.com>;tag=C643D58961F545B Call-ID: 734ea4e359617902c2098433b CSeq: 1 INVITE Server: BusyOptions/6.0.0.0 ms-diagnostics:    1034;reason="Previous hop federated peer did not re...

NOTE: The configuration advice and technical description can be found here: http://lyncuc.blogspot.de/2016/10/busy-on-busy-guide-for-skype-for.html Navigate to the Voice Policy in the Voice Routing Section Here you can enable Busy on Busy on a GLOBAL Policy or based on USER/ SITE policies. Author: Thomas Poett MVP, Business Unit Lead Microsoft Unified Communication