Internal recipients that reside in source receive this email message with unchanged addresses. Then Address Rewrite Service pass the processed email message to source Exchange Online environment. These addresses in "From", "To" and "Cc" of the email message are rewritten for all external recipients. Address Rewrite Service receives email from domain, check mail user eligibility to make address rewriting and then process it by rewriting mail domain to mail domain for every address of users added to coexistence space.When user sends an email as domain mail user, it redirected to Address Rewrite Service server in case it is addressed to the external recipients.Source recipient gets message as it was natively forwarded from target Exchange online environment from corresponding email user When the reply or a new mail arrives to target mail domain it will be forwarded to the source.
External recipient doesn’t aware about and replies (or create a new email) to the mail user.Target Exchange Online sends message to external recipients as it was sent by user from mail domain, all addresses of users added to coexistence scope in "From", "To" and "Cc" are rewritten for external recipients.Then Address Rewrite Service pass the processed email message to target Exchange Online environment. When user sends an email as domain mail user it redirected to Address Rewrite Service server in case it is addressed to the external recipients.The basic mail message flow in domain coexistence with Address Rewrite Service looks like: Address Rewrite Service will take all the necessary steps for creating this coexistence space in Exchange online environment including creating and managing all necessary connectors, mail flow rules, mail-enabled users and groups both in source and target environments, leaving on behalf of administrator only adding or removing source mail user to this coexistence space and activating / deactivating Address Rewrite Service. You can disable address rewriting at any time or turn off address rewriting for individual mailboxesĪddress Rewrite Service is intended for creating a coexistence space for domains in which all the email messages coming from the source or target mail domain will look alike they was send from the unified mail domain according the selected settings. Optionally: add Address Rewrite Service's IP address to the target DNS SPF recordĮnable address rewriting. Check the documentation on matching or migrating accounts.īasic Address Rewriting workflow consists of the following steps: Mailbox provisioning is not required, mail users are also supported. IMPORTANT: The service only works with accounts that have pairs in the target tenant. Address Rewrite Service requires additional licensing.
You can specify the users that are processed by the service, for example, only turn it on for Sales and Marketing team members. All incoming mail is automatically redirected to the source or target mailbox according to specified mail forwarding direction.
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