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UPD in 2020??? Its FSLogix time my friend 🙂

you are right , we are planning to migrate to fslogic soon . Do you think UPD is the problem ?

Windows firewall enabled? Sounds like you have a sh*t load of firewall rules. This is a common issue with firewall enabled and UPD

yes , firewall enabled

Please check the amount of firewall rules on one of your rds host.

i have only see that each host has the default rules x the number of the users logged in

that sounds ok

ok

Do you have set this key as well? HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\DeleteUserAppContainersOnLogoff (DWORD) and set it to 1

let me check

Yes and cleanups up the cached rules created during user logon in the UPD

if the user are just disconnect and wont log off ?

Don’t know if its still requred for 2019. But for 2016 it’s a best practice

thanks for the tip

You’re welcome

This was a bug in Server 2016 that took Microsoft two patch runs to "fix" but then required this registry key to make the fix "work". 😛 EDIT: "This" being the user profile aggregation of firewall settings for each session they had/have on all session hosts.

this is why we love MS

Wonder if you have potentially hit a vhd mounting bug here - vaguely recall seeing something similar in 2016 where a scheduled reboot resolved it, don’t think we ever got to the bottom of it :-(

no nothing like that