I got the error as below :
Reason : A boot identity file contains user credentials for starting and stopping an instance of WebLogic Server. An Administration Server can refer to this file for user credentials instead of prompting you to provide them. Because the credentials are encrypted, using a boot identity file is more secure than storing unencrypted credentials in a startup or shutdown script. If there is no boot identity file when you start a server, the server instance prompts you to enter a username and password. The boot identity file can be different for each server instance in the domain.
Admin Server boot.properties path :\user_projects\domains\bifoundation_domain\servers\AdminServer\security
Note : The User name and Password is already in encrypted format , just remove that and change the entry .
BI Server boot.properties path:
Save these files and start the services again. You should be able to start the server
PS-In most of the cases this will resolve the issue but in some cases when you restart the weblogic services the error still persist and the username and password doesn’t get encrypted.
In such cases there is another alternative go to the config. xml location in the Path folder location
In this find for the node
Copy the very same user name and password in the boot.properties file and start the services. Once the services are started then you can see the username getting encrypted.