User impact: Users may have been unable to paste Excel tables into Outlook on the web email messages.

More info: Initial testing indicated that the issue only occurred when utilizing the right click and pasting feature. Therefore, affected users may have been able to circumvent impact by using the CTRL+V keyboard shortcut to paste Excel tables into emails manually.

Final status: We’ve validated and applied the code fix to all affected environments, and we’ve verified with affected users that this fix has successfully resolved the problem.

Scope of impact: Impact was specific to some users who were served through the affected infrastructure attempting to paste Excel tables into Outlook on the web emails.

Start time: Thursday, April 20, 2023, at 4:41 PM UTC

End time: Wednesday, April 26, 2023, at 12:07 AM UTC

Root cause: A recent feature update that was intended to improve custom context menus that appeared after right-click mouse movements had introduced an impacting code bug.

Next steps:
– We’re investigating how the recent feature update that was intended to improve custom context menus that appeared after right-click mouse movements introduced an impacting code bug to prevent this problem from happening again.
– We’re also assessing why impact wasn’t identified prior to deploying the impacting update so that we can improve our update testing practices.

This is the final update for the event.