Single Signon From BPMOnline To another Cloud App

Hi Team,

Does anybody worked on Single sign on between BPMonline and other application? I have a button in the Contacts object which will redirects to the another cloud application. This button will open app in a seperate tab and user needs to login manually. I need to login to other application with BPM User name and password automatically. Currently my BPMOnline application is a cloud instance. I have read about one login and I am able to login to other application from one login but not from BPMOnline.

Please help if you have any solution.

Thanks,

Venkat.