This is still a very new feature of Lexis Nexis Academic.
Before distributing a link generated from this function, it is very important to test pasting and loading it. Occasionally, when one tries to load a link, the following message will appear: This content is not available on your subscription. For more information, please contact your Account Executive.
If a link loads this message, it will never work. It will be necessary to re-attempt creating the PURL.
At present the only work around seems to be to close out of the database, reopen it, redo the search, and then to try copying the PURL again.