Hi Elise,
I investigated it a bit more and found that none of the permalinks were functioning for my site, although I was sure they were initially. Switching the WP Permalinks setting to Plain got my pages loading and I determined that the Exchange Store page would work when I set it’s Page Type to WordPress.
Long story short I found a helpful article that described how to reset the Permalinks settings, their relationship with the .htaccess file and finally led to the proper configuration of my sites .conf file so I could change my Permalinks setting to use the prettier Postname option.
Thanks for your reply to my question, your advice got me moving in the right direction.
Regards,
Nick