I recently had to add to one of our domain a subdomain for a demonstration and noticed that due to the non-www to www redirection of Admintools on the main website, I could not reach this subdomain, the url being also redirected.
I managed to escape this situation by adding manually a second exception to the rewrite rule in the htaccess file (attached screenshot) but it means I have to maintain the file manually as I have no way to include this exception via the htaccess maker of Admintools.
It would be great in future versions to have a field allowing us to add such exceptions in the htaccess maker as it's quite a common case.
Have a nice day.
Helene