We can forcefully expire password for all EBS user.This feature is available after RUP4.We need to apply  Patch 4676589 ATG RUP 4 enabling this feature.

Script:

The below script can be used to expire all passwords in the fnd_user table $FND_TOP/sql/AFCPEXPIRE.sql.

Execution Method

Connect to SQL*Plus
sqlplus  APPS/ APPSPASSWORD
@AFCPEXPIRE.sql

OR

Submit Concurrent Program

 CP SQL*Plus Expire FND_USER Passwords

Note:
This script sets the fnd_user.password_date to null for all users which causes all user passwords to expire.The user will need to create a new password upon the next login.