All inbound file and printer sharing exception - not working?

[TP14750]

Years ago I configured the "Windows Defender Firewall: Allow inbound file and printer sharing exception" to only accept connections from my management servers. This worked well, until I discovered recently it wasn't working any more. I don't want my user's computers being able to talk to one another, but I need the ability from my management servers. I've determined that it doesn't matter what I set the "Allow unsolicited incoming messages from these IP addresses" to, it allows everything. For example, if I set the field to "8.8.8.8" then any network node can access File/Print Sharing on t

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