Prefer the provided account email in AutoDiscover auth prompts.

If set, this policy setting governs the displayed email in auth prompts related to AutoDiscover.

Default (0): Prefers the account UPN, when available.

If you enable this setting, then AutoDiscover auth prompts will prefer the provided account email (can be either SMTP or UPN depending on which was configured).

Supported on: At least Windows 7

Registry HiveHKEY_CURRENT_USER
Registry Pathsoftware\policies\microsoft\office\16.0\outlook\autodiscover
Value Namepreferprovidedemailinautodiscoverauthprompts
Value TypeREG_DWORD
Enabled Value1
Disabled Value0

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