Prefer the provided account email in AutoDiscover auth prompts.

Supported on: At least Windows Server 2008 R2 or Windows 7

Registry

HKCU software\policies\microsoft\office\16.0\outlook\autodiscover

Value name: preferprovidedemailinautodiscoverauthprompts

Enabled: preferprovidedemailinautodiscoverauthprompts = 1

Disabled: preferprovidedemailinautodiscoverauthprompts = 0

Description

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).