After a workstation has been processed by the resource updating manager, and moved to the new target domain, dial up passwords are unavailable. When an attempt to use a previous dial up connection the user is prompted for a password.
During the processing of a workstation there are items that can not be processed because of the way they are stored within the registry. Other examples of items which can not be updated are some Web site passwords, VPN passwords, Internet Explorer Certificates, etc. Please refer to the below explanation for more details.
This information iskept in Windows Protected Storage and anything that is storedthere (such as information for Auto complete option in IE, Outlook Express passwords, pop3 passwords, etc.) is encrypted and can only be accessed by the Original User. This information is not available when newtarget Users start using the old profiles becauseit is encrypted with the original objects SID stored underHKEY_CURRENT_USER\Software\Microsoft\Protected Storage System Provider.
Please refer to the following Microsoft article - Windows 2000 Services for more information on Protected Storage:
http://www.microsoft.com/windows2000/techinfo/howitworks/management/w2kservices.asp
Protected Storage- provides protected storage for sensitive data, such as private keys, to prevent access by unauthorized services processes or users. (Protected Storage) P-Store is a set of software libraries that allows applications to fetch and retrieve security and other information from a personal storage location, hiding the implementation and details of the storage itself.The storage location provided by this service is secure and protected from modification. P-Store uses the Hash-Based Message Authentication Code (HMAC) and the SHA1 cryptographic hash function to encrypt the users master key. This component requires no configuration. Disabling it will make information protected with this service (for example, private keys) inaccessible to you. P-Store is an earlier service that has been supplanted by the Data Protection API (DPAPI), which is currently the preferred service for protected storage. Unlike DPAPI, the interface to P-Store is not publicly exposed.
Internet Explorer Auto Complete History is lost after a User Switch (migration)
https://support.quest.com/SUPPORT/index?page=solution&id=SOL14497
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