Dec 07, 2017 This article is describing a brief guide on how to prevent internal users from auto-forwarding emails to external mailbox users and on how to disable automatic email forwarding in Office 365 and Exchange Server. Allowing users to use mail auto-forwarding brings the risk of information leakage. Additionally, users can select the option to not keep.
We have Office 365 account(O365) on the cloud. We have a situation where we won't be able to use O365 or EWS APIs to access some emails. So the best solution at this moment is, if possible, to forward all incoming/outgoing emails to our mail servers instantly. i.e when a user receives email on O365, a copy of that email should be forwarded to our mail servers.
Is it possible to configure such a setting so that when 0365 has incoming emails, the other mail server also receives a copy? Few seconds delay is fine.
I know this can be done per user basis where each user has to configure a forwarding email address but we wanted to do it for the whole AD accounts not for a single user.
FYI: We have to do heavy processing on each incoming emails.
WowBowWowBow
2 Answers
Configuring in bulk (via Powershell with Exchange Online for instance) mailbox level forwarding where it would deliver to both the O365 mailbox and a second mailbox elsewhere could be done...but you would need to stay on top of it for new users.
Something like:
but with an array and you'd have to know the formatting of external recipient email address and it would need to be standardized (such as bob@local being forwarded to bob@external). Otherwise, the scripting would require a very large input file for both mailbox and external address.
Without doing this, what you are wanting is called 'Dual Delivery' and it isn't something that O365 has available built-in even with its own transport rules.
TheCleanerTheCleaner
It doesn't sound like exchange online is doing anything to your benefit if you want to forward all email to another mail server? Why not point your MX record to the other server and cut out exchange online all together?
Dow-JDow-J
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Hi Andreas Lindlöf, Firstly, there is no official article to convert an Office 365 group to a regular user mailbox in Office 365. As to forwarding the emails sent to the Office 365 group to another account, I have done some research and tests and found it’s not feasible to do this directly, too. Given the situation, here are two suggestions which you may take into consideration: 1. As I understand, you can create a separate Office 365 account (with another email address) and add him as the only member in the Office 365 group. Then, you can grant the send as permission of the Office 365 group to this user and let this user subscribe to the Office 365 group so he can send emails as the Office 365 group address and receive emails sent to the Office 365 group. 2. Based on my test, we can create a licensed user with the same email address after deleting the corresponding Office 365 group for a few minutes. If you choose this option, please make sure you back up all the files and emails in the Office 365 group before the deletion if you/the user still want to access them later. Let me know if anything is misunderstood. Thanks, Sam