We have an intranet running WordPress, and when browsing the site, the URLs start redirecting from HTTP to HTTPS. i don't know WordPress at all, and have browsed the forums with no luck.

Clearing cookies temporarily solves the problem. Stealth/InPrivate mode works successfully.

Based on advice from other forum posts I've viewed:

On the server - .htaccess. - no mention of HTTPS
Within Portal > Dashboard > Settings > General. Both sites are HTTP
Within Portal > Active Plugins doesn't seem to have anything to do with HTTPS.

What else can I try? I'm hesitant to make a change because I've seen a lot of posts about people getting locked out of the site after changing something.