I had to send a library to someone off-site so I zipped everything up and sent it to them.  When they tried to open the file, they got an error message saying they do not have access privileges to complete the operation.

Anyone know what went wrong or on which end?

Which version of Endnote?  If the “Send to” or “compress library” option from the File menu is available, you should use that to compress the library.  

Thanks, Leanne!  That’s perfect.