As the admin of an Office 365 organization, you might have company requirements to set up email forwarding for a user's mailbox. Email forwarding lets you forward email messages sent to a user's mailbox to another mailbox.
- Sign in to Office 365.
- Click on the admin app tile.
- Select Users > Active Users
- On the Active users page, choose the user who's email you want to forward.
- Scroll down to Mail Settings and expand using the drop-down. Click or tap Edit next to Email Forwarding
- On the Email forwarding page, select Forward all email sent to this mailbox toggle, enter the forwarding address, and choose whether you want to keep a copy of forwarded emails. If you don't see this option, make sure a license is assigned to the user account. Choose Save.
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To forward to multiple email addresses, create a distribution list, and then set up forwarding to point to the DL's address using the instructions in this article.
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Once you set up email forwarding, only new emails sent to the from mailbox will be fowarded.
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Email forwarding requires that the from account has a license. If you're setting up email forwarding because the user has left your organization, another option is to convert their mailbox to a shared mailbox. This way several people can access it. However, a shared mailbox cannot exceed 50GB.