UPN

In the Ultra Transcenders books

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Each book explains UPN in context, with comparison tables and the common traps.

Terms in this definition

• Chat message roles

  Labels on chat messages: instructions go under system, the person's input under user, the model's previous answers under assistant, and results returned by a called tool under tool (or function).

• Domain

  A way of grouping workspaces by area of the business, in support of a data mesh approach. Items take on their workspace's domain, letting you filter the OneLake catalog by it, and certain tenant settings can be passed to domain admins; domains have no effect on access permissions.

• organization

  VCF Automation's top-level tenant, completely isolated, owning separate users, networks and resources. Three kinds exist: All Apps, VM Apps and Provider Consumption.

Related terms

• Custom domain

  A DNS name of your own attached to a service. In an Entra tenant it is verified through a TXT or MX record, and every on-premises UPN suffix used to sign in must be one (.local can't be); for App Service it is bound with CNAME or TXT validation.

• Delegated Login Identity

  When single sign-on uses Kerberos Constrained Delegation through application proxy and a user's cloud name doesn't match their on-premises name, this option picks the identity the connector requests a Kerberos ticket for. Choices include the UPN and the on-premises SAM account name.

• Duplicate attribute resiliency

  If two objects claim the same UPN or SMTP proxy address, Microsoft Entra sync doesn't fail the export; it parks the clashing value and gives the object a stand-in onmicrosoft.com UPN. Once someone sorts out the clash, the original value returns without any manual step. This behaviour can't be switched off.

• Guest user

  Entra account whose UserType is Guest, created when a B2B invitation is accepted; its UPN takes the #EXT# form, but that is not what the person signs in with.

• Hard match

  When syncing, an on-premises object is first paired with one already in the cloud using sourceAnchor and immutableId. Only when that pairing doesn't work does sync fall back to a soft match on UPN or primary SMTP address.

• Name suffix routing

  Decides, on a forest trust, which DNS, SPN and UPN suffixes have their authentication traffic directed across to the other forest.

• Reset redemption status

  Sends a fresh invitation to a guest, for instance when their sign-in email has changed, while preserving their object ID, group memberships and app assignments. Their UPN stays the same.

• USERNAME

  Desktop shows DOMAIN\user; once published to Power BI's service, a UPN comes back instead. Either way, it identifies whoever is currently viewing.