I got this from the documentation,

“If you’ve installed bbPress into a subdirectory of your WordPress installation, define $bb->wp_home and $bb->wp_siteurl as your WordPress blog address and WordPress address, respectively. Both sites will now share the same cookies so that when you’re logged into one, you’re logged into the other.”

so why would’nt this work for me? probably something simple that i’m overlooking. But i do have those two variables set (in my case, they are both, http://exampledomain.com), and nothing!, i have to login to both systems.

They do share the same usertable, just not the session cookies.

[@mdawaffe Member 18 years, 2 months ago]

You’re using WPmu, yes?

It’s a little different. See my response here: https://bbpress.org/forums/topic/77?replies=6

You could use the $bb->wp_home stuff, but you’ll have to also:

$bb->usercookie = ‘wordpressuser’;

$bb->passcookie = ‘wordpresspass’;

Since MU cookies are structured a little differently than WP cookies.