You can disable the ability for your employees to configure ShareFile Sync (for Windows and Mac) if they do not have a specific registry/.plist key on their device. Below is how you would accomplish this.
In your ShareFile account navigate to Admin -> Power Tools -> Sync
Change the drop down from “Enabled” to “Disabled.” You will now have the option to generate a key which will be used within the devices registry or .plist.
Windows: for more information visit the ShareFile Knowledge Base article
On the user’s device go to HKEY_CURRENT_USERSoftwarePoliciesCitrixShareFileEnterpriseSync and add the following registry key:
Key Type: REG_SZ
Set the value to the custom key generated within the Web UI
On the user’s device go to the following .plist, com.citrix.ShareFileFL.SFSyncEngine.plist
Set the value of the String to the custom key generated within the Web UI