Disable shared mail folder caching

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

Registry

HKCU software\policies\microsoft\office\16.0\outlook\cached mode

Value name: cacheothersmail

Enabled: cacheothersmail = 0

Disabled: cacheothersmail = 1

Description

This policy setting allows you to control the caching of shared mail folders. If you enable this policy setting, Outlook will only cache shared non-mail folders. If you disable or do not configure this policy setting, shared mail and non-mail folders you have access to are cached in your .ost file when you add another mailbox to your profile.