Update – This is now resolved In Skype for Business CU 1 June 2015

Just spotted this on Twitter posted by Matt Landis. Microsoft are investigating.

If you are using Exchange Auto Attendents and transfer to users or response groups the normalisation will fail and may route call externally and back. Ok if the numbers a ddi if not it will fail. 😦

More details below.

https://social.technet.microsoft.com/Forums/office/en-US/d91960c6-6e3c-4000-9c11-da208d3d0225/warning-skype-for-business-server-2015-has-a-normalizationmatching-bug-problem-for-those-with?forum=lyncdeploy