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:
Name: CustomSharedKey
Key Type: REG_SZ
Set the value to the custom key generated within the Web UI
Mac:
On the user’s device go to the following .plist, com.citrix.ShareFileFL.SFSyncEngine.plist
Add: CustomSharedKey
Type: String
Set the value of the String to the custom key generated within the Web UI