Credentials needed when creating Virtual Database

by Nov 25, 2015

Hi all,
i have two domains, one for production, one for dev, i have take backups of my production databases and want to make them virtual whith virtual database on my dev plateform.
My problem is that when i add a backup file with the UI, he ask me for credentials, and in production or in dev we do not have specific credentials for backup.
I have also tried to restaure this backup with ssms with success, and no credentials needed.
I have check with my sysadmin and in dev, i have all the possible rights set on the plateform.
Any help woulb be appreciate.