Tuesday, September 29, 2015

Changing the primary SIP domain

Recently I came across a situation where it was necessary to change the primary SIP domain for a Lync 2013 customer (although this will work for any Lync or Skype for Business deployment). This is not a very difficult process but there are a few gotchas which I would like to share...

  1. Make sure that you change the SIP address for all your users after making the change to the new SIP domain
  2. Make sure you run the bootstrap after you have made the change on all servers
  3. Make sure you modify all your RGS workflows to use the new SIP domain
  4. Finally, and the hardest one (because its not documented anywhere); you will need to manually edit the application contacts using ADSIEdit.exe to use the new SIP domain

 Changing the Application Contacts

First open ADSIEdit and go to the configuration node, and navigate to the Application Contacts folder:



 Once there, open each entry and modify the msRTCSIP-PrimaryUserAddress and Proxy address to use the new SIP domain:



Don't forget to restart the services that you have changed !!

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