Policy

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).

Policy
PackMicrosoft Office
CategoryMicrosoft Outlook 2016 / Account Settings / Exchange
Policy ID72a9fb5b387e
Internal nameL_PreferProvidedEmailInAutoDiscoverAuthPrompts

Registry

Copy registry mappings

HKCU\software\policies\microsoft\office\16.0\outlook\autodiscover\preferprovidedemailinautodiscoverauthprompts (enabled) = 1
HKCU\software\policies\microsoft\office\16.0\outlook\autodiscover\preferprovidedemailinautodiscoverauthprompts (disabled) = 0

Policy notes

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).

Related policies

Allow Outlook Autodiscover to interact with Office Config ServiceAuthentication with Exchange ServerAutodiscover is always capable of using modern authenticationAutomatically configure profile based on Active Directory Primary SMTP address (one-time only)Cached Exchange low bandwidth thresholdConfigure Outlook Anywhere user interface optionsDisable AutoDiscoverDisable connection fallback between protocolsDo not allow an OST file to be createdDo not allow users to change permissions on foldersDo not create new OST file on upgradeDo not display Folder Size button on folder properties dialog boxDo not validate personal Contact Groups when sending e-mail messagesDon’t show redirect warnings for Autodiscover for the specified HTTPS server namesEnable RPC encryptionExchange Unicode Mode - Ignore OST FormatExchange Unicode Mode - Silent OST format changeExchange Unicode Mode - Turn off ANSI modeOnly connect if Proxy Server certificate has this principal namePrevent adding non-default Exchange accounts