Exchange/Outlook contacts and Skype for business contacts

Dear IT-colleagues,

I am facing the following situation:

 

I have personal contacts in my Exchange addressbook. This contacts are mail enabled and have a phone number.

 

My problem: In my Skype for Business Client these contacts don't show up. I know the option to call the contacts through the Outlook client menu which is displayed when I hover the contact. But I am also using a SIP phone which is Skype certified (Yealink T48S). In the phone addressbook are only contacts showing up which are S4B contacts and not Exchange contacts.

 

My request: Is it possible to sync Outlook/Exchange Contacts with the personal Skype for Business Addresslist and reversed?

 

Thanks in advance.

 

Best,

Sandro