This addon will connect your WHMCS installation with the LiteSpeed Technologies licensing server. This means that actions your customers take in WHMCS (such as ordering a new LiteSpeed Web Server license) will automatically be reflected in your LiteSpeed account. You can also view, index, and manipulate your LiteSpeed licenses from the WHMCS admin side without logging into LiteSpeed's site.
Let us know if you hit any bugs or want any other features.
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The addon can be found in the app store: http://www.whmcs.com/appstore/2074/LiteSpeed-Reseller-Addon.html
Full documentation is included in the download.