I setup WordPress Multisite a while ago. I added one on a custom domain, and more on subdomains of the main site. Since then I've added more on subdomains, and so far everything has worked fine.


I added another on a custom domain, and for some reason I cannot log into it. Each login attempt redirects to the login page again. All the other existing domains still work just fine.

What I Tried

I'm pretty sure it is cookie related. I was able to login once by resetting the password, but then it didn't login again. I've tried multiple browsers to see if that was the issue.

I checked the .htaccess to see if there were special directives for either of the custom domains, and didn't find anything. I compared the settings for both sites (from the Network Admin dashboard) and didn't see anything out of the ordinary.

1 Answer 1


Found the answer. I had not ran the Domain Mapping plugin before switching it to a custom domain. So the correct steps should look like this:

  1. Create new site as a sub-domain (site.example.com)
  2. Point sub-domain at root (example.com)
  3. Point custom domain (site.com) at root (example.com)
  4. Visit admin page for sub-domain (site.example.com)
  5. Add custom domain (site.com) to Domain Mapping plugin
  6. Visit custom domain (site.com)

I had forgotten step 5 and tried to just edit the site to be at the custom domain instead of the sub-domain.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.