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License Statistics identifies and displays usernames using data provided by the license server using a query tool (normally lmutil). If the license server does not provide valid usernames, License Statistics cannot use the data to display the username in the log or the web-based UI.
For example, if the lmutil output for CITRIX does not contain valid usernames for specific checkouts, it will use the syntax "string1 (string2)", where string1 is the value of the string stored in place of an actual username and string2 is an additional string to help distinguish users. This data is not recognizable by License Statistics.
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