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Starting this week, some emails (all of them are sent from internal domain) in Outlook shows yellow envelope icon. Opening and reading this email does not make this icon disappear. The only way to get rid of if it is to reply to the email, then the envelope is replaced with arrow.
Is this some new feature, bug or something is wrong iwth our Exchange server?
This is how it looks like in Outlook:
Using Classic Outlook on Windows for personal email, calendar, and contact management
Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.
Mine only show up when I receive an email as part of a group, rather than individually
Interesting. In my environment, it seems that the icon shows up when the "Suggested Replies Feature" is enabled in Exchange Online. When the message is responded to (whether using a suggested reply or not) the icon simply goes away.
If you can wait this annoyance out, it seems Microsoft does intend to fix it.
You can follow that thread here: Released: March 2024 Exchange Server Security Updates - Microsoft Community Hub
While this seems technically correct, the envelope icon appears to simply be replaced with a "reply" arrow icon:
This shows up when a message has not been replied to. If you reply to the message the icon will go away.