Title: Users may intermittently be unable to “Reply All” to email messages using a group mailbox in Outlook on the web
User impact: Users may intermittently be unable to “Reply All” to email messages using a group mailbox in Outlook on the web.
More info: Affected users intermittently receive the following error message when attempting to “Reply All” from a group mailbox in Outlook on the web: “This message can’t be sent right now. Please try again later. Set action is invalid for property.” The impact can be bypassed by replying to these messages from outside of a group mailbox.
Current status: We’ve determined that the code change previously thought to be the cause of this issue may not be fully responsible. However, the revert of this code change is underway and now expected to fully saturate on Friday, September 22, 2023. We’re further investigating a reproduction of the issue to gain a more comprehensive understanding of the factors contributing to the underlying cause of the issue so we can identify a remediation strategy that fully resolves the issue.
Scope of impact: This event may intermittently impact users who attempt to “Reply All” to email messages using a group mailbox in Outlook on the web.
Start time: Friday, August 4, 2023, at 5:32 PM UTC
Root cause: A code change meant to improve conversation grouping is causing the intermittent “Reply All” impact.
Next update by: Friday, September 22, 2023, at 7:00 AM UTC
