1. Have the client log/sing into Skype For Business Client.
2. Click on the Gear icon on the top right of the Skype For Business Client.
3 On the left side menu options select the Call Forwarding Option. Then select the bubble option listed Simultaneously Ring Option. Add or change the User/Number or Groups of Individuals you would like to have enabled or modified.
4. Click on the OK at the bottom of the menu screen. You have now enabled this feature function.
NOTE: if all of the above steps do not resolve the issue, call your help desk
or escalate to tier 2 as per Skype / Lync support KB.
Primary Escalation Path: Skype for Business (Lync 2013 / 2010)
· Team: Skype 2nd Line Support, Tier 2.