It’s possible to use Jasig CAS for SugarCRM Authentication.
First install CAS PHP then in your sugar install go to modules/Users/authentication and place
CASAuthenticate. I hard coded my server settings in so make sure to edit the files for your purposes. Edit – you can get a nicer version here on github.
Then edit config.php add
'authenticationClass' => 'CASAuthenticate',
to $sugar_config = array
SugarCRM is supposed to support SAML but I haven’t been able to make it work.