Disable Emailing of Password when Updating Password | IBM Maximo

in Security > Users Application
Click Security Controls from Select Action
Select " Allow Generated Passwords to Be Displayed On Screen option"
and hit OK.

we are done :)

By disabling this option, you do not need to set up the SMTP server or provide email information for the user when creating a new user and password or updating an existing password.

Reference: http://www.ibm.com/support/knowledgecenter/SS2GNX_7.2.2/com.ibm.tivoli.tpm.scenario.doc/security_troubleshooting/trcom_disablingpsswd4update.html