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Just switched to Exchange Online, and ran into an issue. We have an application that lets an employee email a customer. With our previous mail provider, we would authenticate to the SMTP server using a generic mail account we used for various applications (ie support@example.com). It would let us set the "reply name" and "reply address" to the employee's name and address, which we know based on internal app authentication. However, Exchange Online does not seem to allow authenticating with one address and setting the "reply address" to another.

Is there any way to authenticate to smtp.office365.com via "support@example", but set the reply address to the employee's address, such as "frankie@example.com". We use this to segment our customers so they are assigned to certain employees, and every attempt to change anything is failing.

Christopher H
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SomeGuy
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  • Would it be safe to assume that you are using Outlook on the local workstations to send and receive mail? – Christopher H Aug 17 '20 at 20:58
  • We are at the moment stop we could probably open a new mail window programmatically but don't want to build a dependency on a mail client. – SomeGuy Aug 18 '20 at 02:47

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In general, we use Outlook feature to configure from message sender side to reply to a specified address. However, according to your description, we have to use a workaround. Create transport rules to redirect messages. You can create a rule like this “when the recipient is support@mycompany.com, redirect the message to frankie@mycompany.com”.

enter image description here

Since it won’t display the frankie name when users reply messages from support@mycompany.com, you may have to create a rule to prepend the disclaimer to notify users when they receive message from support@mycompany.com:

[1]: https://i.stack.imgur.com/w3RDC.png

Jayce
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