My website has three 'parts': a front page (www.mywebsite.com/home), a Moodle site (moodle.mywebsite.com) and a forum (forum.mywebsite.com). I installed Moodle and phpBB and they are at the correct pages, and I have a database for each (mywebsite_mdl1 and mywebsite_php1). I want the usernames and passwords to be common to both the forum and Moodle. E.g. When a user registers on one they are automatically 'installed' on the other. Even better would be if logging on to one also logged you on to the other. I have googled this and read some, and it seems possible, but I don't understand what I need to do next to make that happen. This forum kept coming up in my searches so I thought I would try here. TIA .