Hi,
Would you please tell us why you want to rollback to Lync client from Skype for Business client?
Base on my test, it seems that the shortcut for "Skype for Business 2015" and "Skype for Business Recording Manager" will not back to Lync after uninstall the latest KB from Add/Remove programs.
There is no impact to use Lync client, but only the confuse of the icon. As the Skype for Business client is updated, you can update to Skype for Business client.
Best Regards,
Eason Huang
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Eason Huang
TechNet Community Support
