Skype app control - allow Skype

I know that ZIA has a control to block Skype but we want to allow Skype (and Outlook) and block all other internet access but Skype is not in cloud app control. Skype is also part of the Collaboration and Online Meetings URL category but we don’t want to allow all in the category. Any suggestions on how to configure?
Thanks

Creating a custom category including all skype URL’s added in the URL retaining Parent Section .This should be followed by a deny rule for that user/group/location .This should get only skype working for that group and rest Internet should be blocked.
Outlook can be allowed via Cloud App policy and should be followed by a deny rule for that user/group/location .