We have user’s that have multiple emails accounts due to the need to send out email and receive emails with the same domain/service provider name eg. @maindomain / @domain1 / @domain2 etc.

And some of our users have up to 5 different emails that they need to manage currently and with us moving to office365 I can understand that this will eventually be a huge issue with licensing, searching and managing.

In my mind the best option to correct this issue would be by setting up a way for these users to send and receive emails from their main account (So not an alias, as that is one way). This option needs to be functional for both OWA/365 and desktop outlook. That way they can use one mailbox and the user can change the outgoing emails to the domain and the external party won't see the difference.We are using hosted exchange right now, in the future planning on moving to Exchange online.

There are multiple approaches: consolidate to single mailbox (send from single alias),use shared mailboxes (forward messages to single mailbox, use Send As permissions to send), use DGs (similar to the shared mailbox scenario), use third-party tools... It's a very common question, do a search and you'll find more detailed answers.

Hi,

>>That way they can use one mailbox and the user can change the outgoing emails to the domain and the external party won't see the difference.

One user mailbox could havemultiple email address, all those email address could be used to receive email if there exist related MX record.

But, user can only use one of those email addresses as the reply email address(The SMTP email address), this one is controlled by administer rather than end-user.

If you want to let users to use different email address to send email to different domain, you may need to createmultiple mailbox or group for this user. Or, you can give this user permission to modify his reply email address.

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Regards,

Kyle Xu

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Hi John-Paul.Caldwell,

I am writing here to confirm with you how thing going now?

If the above suggestion helps, please be free to mark it as an answer for helping more people.

ThisExchange Server 2019 Forum will be migrating to a new home onMicrosoft Q&A, please refer to this sticky postfor more details.

Regards,

Kyle Xu

Exchange Server 2019forumwill be migrating to a new home onMicrosoft Q&A! We invite you to post new questions in the new forum.

For more information, please refer to thesticky post.