Currently we specify AppServer for OEREALM provider in appSecurity-*-oerealm.xml:
<b:property name="realmURL" value="AppServer://meprobe:5166/AStest730Rest" />
Is there any way we can change this value using RESTMAN (or some other command) after it was deployed to web server?
No, we can't update oerealm provider using RESTMAN or other command.
REST appSecurity configuration files need to be edited manually.