Skype for Business SIP Migration

This migration took place on Thursday December 27th 2018.

UAA IT Services will be doing a cutover of the sign in address used by Skype for Business to

This will make it so that you can login to the Skype for Business client using your email address . After this change users will need to sign out of the Skype for business client on all devices then change the end of the address to Any external contacts will need to communicate with you using the new address.

Old Skype for Business Sign-in Address

New Skype for Business Sign-in Address

Old Skype for Business Sign-in address example

New Skype for Business Sign-in address example

Meeting Invitations

This is only applicable to Skype on Prem users, this does not impact Skype online or teams users.

If you have previously created reoccurring meetings invitations using any of the following methods:

  • Outlook
  • Outlook Web Access
  • Have used the bookameeting site to generate meeting invite links with your sip address in the url

 Then you will need to choose one of the options below:

1. You can generate new links using your new sip address and send out the new meeting invitations.

2. Please follow the section below that deals with your desktop operating system:

Windows Users 


 Mac Users

  • Meeting Links
    You can call the UAA Technical Support Center at 786-4646 and they can work with you to get the links updated.


If you experience issues signing in, not able to see your contacts, or people are showing up as presence unknown please go to the following location:

Windows Users

  • Unable to logon

    Skype for Business: %UserProfile%\AppData\Local\Microsoft\Office\16.0\Lync

    and delete the folder that starts with sip_username.


Mac Users

  • Unable to logon
    1. Log out and quit Skype for Business.
    2. Go to Finder > press Command+Shift+G > type in /users/<MacUsername>/library > delete the following files:
      Containters >
      Internet Plug-Ins > MeetingJoinPlugin.plugin
      Logs > LwaTracing
      Saved Application State >
      Preferences >
    3. Open Keychain Access from /Applications/Utilities folder.
    4. Delete all keychains starting with Skype For Business.

    Note: You may have to unlock your keychain by using your password.


Any known issues will be posted in the FAQ below.