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The user SIDs are built based on the machine SID and a sequential relative ID. When the computers are joined into a domain (Active Directory or NT domain for instance), each computer is provided a unique Domain SID which is recomputed each time a computer enters a domain. This SID is similar to the machine SID.
Active Directory (AD) is a directory service developed by Microsoft for Windows domain networks. Windows Server operating systems include it as a set of processes and services. [1] [2] Originally, only centralized domain management used Active Directory. However, it ultimately became an umbrella title for various directory-based identity ...
It can be used to authenticate local and remote users. Beginning with Windows 2000 SP4, Active Directory authenticates remote users. SAM uses cryptographic measures to prevent unauthenticated users accessing the system. The user passwords are stored in a hashed format in a registry hive either as an LM hash or as an NTLM hash.
Authentication takes place on domain controllers. Each person who uses computers within a domain receives a unique user account that can then be assigned access to resources within the domain. Starting with Windows Server 2000, Active Directory is the Windows component in charge of maintaining that central database. [1]
A Primary username is the name you created when you first signed up for an AOL account. In the past, AOL offered the ability to create secondary usernames linked to this Primary username, however, as of November 30, 2017, the ability to add or manage additional usernames has been removed.
Should a folder of that name already exist, the profile-creation process will create a new one, typically named username.computername, on workgroup computers, or username.domainname on Active Directory member computers. Once a profile folder has been created, Windows will never automatically rename that folder.
The “@domain” part of the user name could be used to indicate which authority allocated a particular name, for example in form of a Kerberos realm name; an Active Directory domain name; the name of an operating-system vendor (for distribution-specific allocations) the name of a computer (for device-specific allocations)
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