Policy

Use the Online Global Address List for Nickname Resolution

This policy setting allows you to force Outlook to use the Online Global Address List for ambiguous name resolution when composing messages in Outlook, instead of using the Offline Address Book when it is available. If you enable this policy setting, addresses are resolved using the Online Global Address List, which may contain additional information (that the Offline Address Book would not have) that allows an address to be resolved. If you disable or do not configure this policy setting, Outlook resolves addresses using the Offline Address Book when it is available.

Policy
Pack Microsoft Office
Category Microsoft Outlook 2016 / Account Settings / Exchange / Cached Exchange Mode
Policy ID a80ae5e98f39
Internal name L_IncludeOnlineModeGALinANR

Registry

Copy registry mappings

HKCU\software\policies\microsoft\office\16.0\outlook\cached mode\anr include online gal (enabled) = 1
HKCU\software\policies\microsoft\office\16.0\outlook\cached mode\anr include online gal (disabled) = 0

Policy notes

This policy setting allows you to force Outlook to use the Online Global Address List for ambiguous name resolution when composing messages in Outlook, instead of using the Offline Address Book when it is available. If you enable this policy setting, addresses are resolved using the Online Global Address List, which may contain additional information (that the Offline Address Book would not have) that allows an address to be resolved. If you disable or do not configure this policy setting, Outlook resolves addresses using the Offline Address Book when it is available.

Related policies

Cached Exchange Mode (File | Cached Exchange Mode)Cached Exchange Mode Sync SettingsDisable Exchange Fast AccessDisallow Download Full ItemsDisallow Download HeadersDisallow Download Headers then Full ItemsDisallow On Slow Connections Only Download Headers