Silo Administrators can control whether end-users are able to save passwords for certain websites, along with web shortcuts. Previously, when end-users were given access to user provisioned web shortcuts, they were given the option to save credentials for supported websites. Now, Silo Administrators are able to manage this functionality via policy
The Password Saving policy is available via the Silo Admin Console > [Manage] Policies > Access & Authentication
Enabled: Users can choose to save their personal login credentials
Disabled: Users cannot save their personal login credentials

More Info
Pre-existing credentials will not be purged if the policy is enforced after the credentials have already been saved; Web Shortcut(s) will need to be removed and re-provisioned in order to clear the saved credentials
Admin Controlled and Shared Web Apps (Shortcuts) can still be provisioned to end-users with saved credentials
Please contact Support for any additional questions