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+## <a name="TWiki_Username_vs_Login_Username"> TWiki Username vs. Login Username </a>
+
+This section applies only if your %WIKITOOLNAME% is installed on a server that is both **authenticated** and on an **intranet**.
+
+%WIKITOOLNAME% internally manages two usernames: Login username and TWiki username.
+
+* **Login username:** When you login to the intranet, you use your existing login username, ex: <code>**pthoeny**</code>. This name is normally passed to %WIKITOOLNAME% by the <code>**REMOTE\_USER**</code> environment variable. %WIKITOOLNAME% uses this name internally to log topic changes. Login usernames are maintained by your system administrator.
+* **TWiki username:** This is your name in [[WikiNotation]], ex: <code>**PeterThoeny**</code>, recorded when you register in [[TWikiRegistration]]; doing so also generates your personal home page in the %MAINWEB% web of your TWiki site.
+
+%WIKITOOLNAME% can map the intranet username to the Wiki username automatically, provided that the Login username and Wiki username pair has been entered in the %MAINWEB%.%WIKIUSERSTOPIC% topic. This happens automatically when you register.
+
+> **_NOTE:_**
+>
+> **To correctly enter a [[WikiName]]**
+>
+> - your own or someone else's - be sure to specify the %MAINWEB% web in front of the Wiki username: write
+>
+> <code>**%MAINWEB%.WikiUsername**</code>
+>
+> or
+>
+> <code>**%MAINWEB%.WikiUsername**</code>
+>
+> . This assures that the name will be linked automatically to the %WIKITOOLNAME%.%MAINWEB% web, where user registration pages are stored, even if the text is entered in a different %WIKITOOLNAME% web.
+
+-- [[PeterThoeny]] - 16 May 2001 <br />