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The sAMAccountName attribute is a logon name used to support clients and servers from previous version of Windows, such as Windows NT 4.0, Windows 95, Windows 98, and LAN Manager.
User Principal Name
User Principal Name (UPN) is a logon name in the format of "UPN-Prefix@UPN-Suffix"
| UPN Prefix | In the Active Directory, the UPN Prefix is called "User logon name" | ||
| UPN Suffix | In the Active Directory, the UPN Suffix can be the "DNS Name" (Implicit UPN) or can be any string defined by the administrator (Explicit UPN).
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Down-Level Logon Name
References
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