View History of Client Access License Pack Installation
You can review your CAL packs installation history in the Administration Console.
You must use an account that is in the Domain Admins group to perform this procedure.
To view the CAL pack installation history
Click Start, click All Programs, click Windows Essential Business Server, and then click Windows Essential Business Server Administration Console.
Click the Licenses tab, and then click Installation History.
In the results pane, review the details for each CAL pack that you installed. Each CAL pack shows the edition, installation date, and number of CALs.