{"id":16140,"date":"2026-04-28T15:01:02","date_gmt":"2026-04-28T06:01:02","guid":{"rendered":"https:\/\/m365jp.net\/?p=16140"},"modified":"2026-04-28T15:02:41","modified_gmt":"2026-04-28T06:02:41","slug":"restoringservice-ex1281449-exchange-online-users-may-be-unable-to-reply-to-email-messages-from-a-pop-up-window-in-outlook-on-the-web","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-04-28-restoringservice-ex1281449-exchange-online-users-may-be-unable-to-reply-to-email-messages-from-a-pop-up-window-in-outlook-on-the-web","title":{"rendered":"[restoringService] EX1281449 | Exchange Online | Users may be unable to reply to email messages from a pop-up window in Outlook on the web"},"content":{"rendered":"
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EX1281449 | Exchange Online | Users may be unable to reply to email messages from a pop-up window in Outlook on the web<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\n\n\n\n\n\n\n\n\n\n
Status<\/th>\nrestoringService<\/td>\n<\/tr>\n
Classification<\/th>\nadvisory<\/td>\n<\/tr>\n
User Impact<\/th>\nUsers may be unable reply to email messages from a pop-up window in Outlook on the web.<\/td>\n<\/tr>\n
Last Updated<\/th>\n04\/28\/2026 05:24:20<\/td>\n<\/tr>\n
Start Time<\/th>\n04\/14\/2026 02:00:00<\/td>\n<\/tr>\n
End Time<\/th>\n<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Users may be unable to reply to email messages from a pop-up window in Outlook on the web<\/p>\n

User impact: Users may be unable reply to email messages from a pop-up window in Outlook on the web.<\/p>\n

More info: This issue may occur within any browser and impacts single reply and reply all functions. While we’re focused on remediation, user testing indicates that by changing browser-specific pop-up settings to ensure that pop-ups are allowed, affected users may be able to avoid impact.<\/p>\n

Current status: We\u2019re continuing to monitor our fix deployment as it saturates throughout the affected environments. As this saturation nears completion, we\u2019re continuing our validation efforts to verify the fix’s efficacy with a subset of affected users and within our internal environments. We expect that this deployment process will be completed in full by our next scheduled update.<\/p>\n

Scope of impact: Users attempting to reply to email messages from a pop-up window in Outlook in the web may be impacted.<\/p>\n

Start time: Tuesday, April 14, 2026, at 2:00 AM UTC<\/p>\n

Root cause: A fix to address an unrelated issue introduced a code issue that\u2019s leading to the impact.<\/p>\n

Next update by: Thursday, April 30, 2026, at 6:00 PM UTC<\/td>\n<\/tr>\n

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