Thomas.Poett@TEAMS (MVP and MSFT v-SSP)

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

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What is important in Office 365 AZURE AD?First activation of the tenant defines the default domain as xx.onmicrosoft.com. where the UPN of user will be automaticall…

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 report diagnostic information"; Domain="westconlab…

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 

It is published in Technet: #The How-To Guide for Cloud PBX in Office 365 Skype for Business Online with Sonus Cloud Link DOWNLOAD:https://gallery.technet.microsoft.com/Cloud-Connector-Configurati-521b533f


This how-to guide is written in technical level 200 for Pre-Sales Consultant and the second half reaches leave 400 for Office 365, Sonus Cloud Link CCE Appliance and the Session Boarder Controller.
We start from the Pre-Sales consulting process and the associated arguments. The Pre-Sales and Consultants will learn how the Cloud Connector Edition is working, technical deep drive inside CCE and last but not least the configuration of Office 365 Skype for Business Online and the wizard based CCE installation. Followed by a common scenario with Cloud PBX and multiple sites across different regions.
Second topic is a direct SIP connection to 3rd party on-premises applications (e.g. Contact Center, local PBX or others). Here we focus on the locally hosted Contact Center. The question might be a…

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