How To Change the Apps Password

The passwords of APPS and APPLSYS must be identical.
So you just need to change APPLSYS password not APPS , by changing APPLSYS
password , APPS password assumes the same value

(i)
Shutdown the Applications Tier services on each of the Nodes
Database Tier Services must be up and running
Any node where APPL_TOP , 8.0.6 and iAS ORACLE_HOME are present is part
of the Application tier
Any node where RDBMS ORACLE_HOME is present is part of the Database tier

(ii)
Then . issue the commands at the Unix command line similar to the following on any Node
of Oracle Applications where the executable FNDCPASS is present in $FND_TOP/bin

To change the APPLSYS password:
FNDCPASS apps/apps_schema_password 0 Y system/system_schema_password SYSTEM APPLSYS new_password
Ex: FNDCPASS apps/apps 0 Y system/manager SYSTEM APPLSYS CITRIX123

To change an Oracle user password:
FNDCPASS apps/apps_schema_password 0 Y system/system_schema_password
ORACLE apps_database_user new_password

Example

FNDCPASS apps/apps 0 Y system/manager ORACLE GL GL_TEST

(iii)
Run Autoconfig on each of the Nodes wherever Application Tier is installed

(iv)

Bring up the Application Tier services on each of the Nodes