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RollBack from LDAP to WAS in RTC

Hi,
If I want to change authentication type from LDAP to Websphere , What are the steps I need to take?
at this point I changed in the 'Available realm definitions' the selection from Standalone LDAP registry to Federated repositories and when I try to login with the local RTC credentials I get an error message "permissions denied your account does not have the group membership required to access the requested resource"
is there anything else I need to do?
***this experiment is done over the test environment.
thanks,
Lior
Accepted answer

Put it simply, you need to re-do the security role mapping, because the "groups" or "users" are no longer the same - having the same ID doesn't mean that you have the same user/group in WAS. That's step 9 in the below document.
https://jazz.net/help-dev/clm/topic/com.ibm.jazz.install.doc/topics/t_deploy_was.html