Adding other XMPP address

Hello,

I had setup an OpenFire account, when it comes to add local domain accounts it successfully works, but when i’m trying to add other jabber server accounts, it does’t work.

As far as I know, a such thing is possible since with Google Talk which also use XMPP you can add other jabber domain accounts.

How to active a such function ?

Example:

If I have test@mychat.com XMPP account behind OpenFire Server I would like to be able to add test2@mychat.com but also somebody@jabber.org.

Thank you in advance !