Relevant products: Exclaimer Cloud - Signatures for Office 365
Emails sent from an internal user to another internal user do not receive a signature or are not routed to Exclaimer Cloud.
Undeliverable journal reports are being sent to an internal mailbox and this has the side-effect of causing some unexpected mail routing.
According to Microsoft, "Any mail to JournalingReportNdrTo mailbox will not be journaled and it will not honor transport and mailbox rules settings. It is recommended to create a dedicated mailbox for JournalingReportNdrTo setting or set it to an external address."
To resolve this issue, you need to specify a dedicated mailbox, as the recipient for Journal Report NDR messages, in Microsoft 365 using the Windows Powershell.
To Install the Exchange Online PowerShell V2 module:
Open the Windows PowerShell and run this command as an Administrator:
Confirm that you want to install this PowerShell module.
To connect to Exchange Online:
- If you have Multi-Factor Authentication enabled, run this command:
In <UPN> enter your username.
- If you don't have Multi-Factor Authentication enabled, run this command:
When prompted, enter your password (and the Multi-Factor Authentication verification code if required).
To specify a dedicated mailbox:
Run the following command:
<[email protected]> is the email address of the user.