How to Append numbers to logon names in case of duplicates

How to Append numbers to logon names in case of duplicates

This - https://www.manageengine.com/products/ad-manager/admanager-kb/append-numbers-to-logon-names-in-case-of-duplicates.html  states to use the profile tab of the template.  I have no profile tab so where is the option to append numbers to logon names?

Tabs I have are;
General
Account
Contact
Exchange
Terminal
LCs/OCS/Lync
Custom Attributes


Running build 6292


Thanks