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Invalid Outgoing delivery method - The outgoing delivery method for a forward mailbox can only be set to None. If you contact support, please provide the technical details.

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"Invalid Outgoing delivery method - The outgoing delivery method for a forward mailbox can only be set to None."

This error is encountered when we select 'outgoing mail' as Server Side Synchronization in mailbox while email configuration. Checked online but couldn't find the reason why should the outgoing delivery method for a forward mailbox be only set to None and how to configure a forward mailbox. Kindly share if someone ever encountered this error and could resolve it.

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LuHao 40,886 on at

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RE: Invalid Outgoing delivery method - The outgoing delivery method for a forward mailbox can only be set to None. If you contact support, please provide the technical details.

Hi partner,

When creating a forward mailboxe, the Outgoing Email of the Synchronization Method can only select None.

Please refer to this Administrator Guide:

[View:https://docs.microsoft.com/en-us/dynamics365/customer-engagement/admin/create-forward-mailboxes-edit-mailboxes:320:50]

If my answer is helpful, please mark it as verified. This will help other users with the same theme.

Hope this helps.

Best Regards,

Lu Hao