Upgrade only the default store

This policy setting allows you to specify that only the default data file is upgraded on the first boot of Outlook.

If you enable this policy setting, only the data file associated with your delivery mailbox is upgraded.

If you disable or do not configure this policy setting, all Outlook data files are upgraded.

Supported on: At least Windows Vista
Registry HiveHKEY_CURRENT_USER
Registry Pathsoftware\policies\microsoft\office\14.0\outlook\setup
Value Nameupgradedefaultonly
Value TypeREG_DWORD
Enabled Value1
Disabled Value0

outlk14.admx

Administrative Templates (Users)