Hi chapmanjw85,
Welcome to our forum.
As the link which you provide, such configuration is not supported by Microsoft, Skype for business for Mac could be referred by the following link:
https://blogs.office.com/2016/04/26/skype-for-business-mac-preview-is-here/
Then, we find a link about how to modify it in Lync 2013, you could have a try on SFB for Mac client. However, please be free to know it is not supported in Microsoft:
https://social.technet.microsoft.com/Forums/lync/en-US/343be6ab-6317-4f29-8cc6-195a12823f2f/disableservercheck-for-mac-lync-client?forum=ocsclients
If there are any questions or issues, please be free to let me know.
Best Regards,
Jim Xu
TechNet Community Support
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