[keycloak-user] How to update defaultGroups via kcadm

Hello, I tried to update defaultGroups via kcadm command line, but it didn't work I want to add a existing group to defaultGroups. The followings I've been tried: $ bin/kcadm.sh update realms/demo -b '{"defaultGroups":["/demogroup"]}' $ bin/kcadm.sh update realms/demo -s 'defaultGroups=["/demogroup"]' Didn't work, even configure defaultGroups when creating realm $ bin/kcadm.sh create realms -b '{"realm":"demo", "enabled":true, "defaultGroups":["/demogroup"]}' It's weird because defaultRoles property seems to work fine. $ bin/kcadm.sh update realms/demo -b '{"defaultRoles":["test", "demo"]}' To verify the changes, run the following: $ bin/kcadm.sh get realms/demo | grep default The result shows: "defaultRoles" : [ "test", "demo" ], defaultGroups never shows. Am I doing something wrong? Please help me, thanks. Best regards, Timothy