after close the RPC range port (491*personal details removed*) from K2 server to domain controller, it will need quite a long time for the user to login K2 site, have you encountered such issue?
Hi,
Perhaps this might help, K2 firewall and ports link.
https://help.k2.com/onlinehelp/k2blackpearl/icg/4.7/default.htm#Prepare/Firewall_Settings.htm
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