Hi,

I have the option to share users for all my subdomains.

But when I'm logged in at subdomain1, I have to relogin in subdomain2. How can I manage to share the login status?

Thanks
Beate

Which version of Joomla are you using ?
In Joomla 1.6, you have to setup the "global configuration" with the "cookie domain" value in aim to share the apache (or IIS) sessions between subdomains.

we actually use 1.5.20
that means we have to update to 1.6 to have this feature.

thank you very much.

No.
In Joomla 1.5.x, there is a patch that allow creating the "cookie domain" parameters.

So if you can not login in a slave site, verify that the first domain that you defined for the slave site is the one that you are using to login.
When you have several domains defined in a slave, only the first domain of the list is used for the "cookie domain".

Also check that you are using the latest JMS version. The current one is 1.2.50.
If you don't know how to get the latest one, see the FAQ
www.jms2win.com/en/faq/faq-joomla-multi-sites#cat-122