Thanks for your confirmation, Garth. I’ve renamed the ‘mu-plugins’ folder and also changed sso.php to sso.txt and given it perms of 000.
And so far, no worries on the site. I have a feeling this site WAS on bluehost a long time ago, but since its not, I made the changes. Once I KNOW no issues exist, I’ll delete the file from the server.
Thanks!