Stay logged in on a Plone site
In Plone 2.5x, to allow users to remain logged in on a Plone site, all you had to do was go to your site ZMI > portal_properties > site_properties > auth_cookie_length > set it to a number of days before it expires.
But Plone 3 came with new authentication, and this stopped working. Eventually a robust fix was added, and you can now set this up as follows:
ZMI > site acl_users > session > properties > Cookie lifetime (in days) > set to whatever you want. Easy when you know how.
Here are some useful links which explain what happened.
Hands up if you love Plone's brilliant way of documenting stuff.
If you are in a hurry then you can call us on 01980 556432 and we'll see if we can help.

