How to perform a bulk price increase on domains that includes domains already registered?

[snowliondev]

So I've headed to the WHMCS - Domains/TLDS page at http://mysite.com/admin/configdomains.php. I ticked the column for the domain i want to update. Then in the Bulk Management section i've updated the prices and hit Save. It asks me to confirm that I want to do that. I say yes. But when I go a look at the price inside existing client accounts it still says the same prices as before. What am i doing wrong? 

[leemahoney3]

You should be able to use the Bulk Pricing Updater addon to do this, included by default with WHMCS. Simply enable it under System Settings > Addon Modules.