External OOF messages between on-premises mailbox and Office 365 Dedicated/ITAR (vNext)

Symptoms

When mail is sent from a mailbox in Microsoft Office 365 Dedicated/ITAR (vNext) to an on-premises mailbox, an external Out of Office (OOF) message is received instead of an internal one.

Cause

This behavior is by default and by design. Microsoft is investigating, and this functionality may change in the future.

Workaround

To enable cross-forest users to receive internal OOF messages, create a new remote domain for the on-premises domain, and make sure that the AllowedOOFType parameter set to InternalLegacy. To do this, run the following cmdlet:
New-RemoteDomain -DomainName <onpremdomain.com> -Name <name> -AllowedOOFType:InternalLegacy 
The new remote domain will have the IsInternal parameter set to True. You can change the settings for the remote domain after it's created by running the Set-RemoteDomain cmdlet.
Properties

Article ID: 3188538 - Last Review: Aug 30, 2016 - Revision: 1

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