yep you can export the results to an xml file, and searchs are saved in a memory buffer so results of all the searchs can be exported together. It is designed IMO as a surgical tool to quickly see all schema attributes for a given user or computer object. There are a number of schema attributes that if exported without converting to "human readable" format look like gibberish. The AD Query tool does the conversion automatically.
I'd say if you just need a general bulk list of AD names and plain-text data then use the method in the thread topic.
AD Query's value seems to come into play when you are troubleshooting object issues or just need to reference object data not viewable in the ADUC MMC. For example, kerberos tickets and delegated trust, last logon time, password last set, home MTA, exchange attributes, etc etc. - Anyway I've found it very handy. There's a user guide for AD Query located on the support page of their website.
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