Here are FQDN bypasses for Skype for Business. Needed ports are TCP 443, UDP 3478, TCP/UDP 50,000-59,999, TCP 5223, and TCP 80.
*.lync.com crl.microsoft.com evsecure-ocsp.verisign.com evsecure-aia.verisign.com evsecure-crl.verisign.com sa.symcb.com sd.symcb.com *.omniroot.com *.verisign.com *.symcb.com *.symcd.com *.verisign.net *.geotrust.com *.entrust.net *.public-trust.com
The above is condensed from here.