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Mar 31, 2025
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Update username-considerations-for-external-authentication.md #37142

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Update username-considerations-for-external-authentication.md
eyalgal Mar 28, 2025
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Update content/admin/managing-iam/iam-configuration-reference/usernam…
eyalgal Mar 31, 2025
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eyalgal Mar 31, 2025
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jc-clark Mar 31, 2025
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5 changes: 4 additions & 1 deletion ...-configuration-reference/username-considerations-for-external-authentication.md
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Expand Up @@ -69,9 +69,12 @@ When you provision a new user from your identity provider, the new {% data varia

If you use {% data variables.enterprise.data_residency %}, when you create an {% data variables.enterprise.prodname_emu_enterprise %} on {% data variables.enterprise.data_residency_site %}, your enterprise's shortcode is randomly generated.

* The shortcode is **not** used as a suffix in the usernames of provisioned users.
* Although the shortcode is not visible in the user interface, it is still appended as a suffix to the usernames of provisioned users. This suffix is not displayed to the users in the UI, but it remains part of their usernames.
* The only place you are likely to see the shortcode is in the username of the setup admin, which will look like `2abvd19d_admin`.

> [!NOTE]
> Due to the inclusion of the hidden shortcode, the character limit for usernames is reduced from 39 characters to 30 characters for GitHub Enterprise Cloud with Data Residency.

## About normalized usernames

Usernames are formed by normalizing the SCIM `userName` attribute value sent from the IdP.
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