Thousands of Sent Items moved to Deleted Items, no rules, no retention
Hello everyone, I'm investigating a very unusual Exchange Online mailbox issue and would appreciate any insights from anyone who has seen something similar. Environment Exchange Online (Microsoft 365) Mailbox: User mailbox Outlook for Mac Outlook for iOS Outlook Web (OWA) Incident Summary On August 13, 2026, approximately 4,997 messages were moved from: The activity occurred over roughly a 3-hour period. Mailbox audit logs show thousands of: Operation: MoveToDeletedItems events. Hourly breakdown: 01:00 - 2,046 events 02:00 - 1,540 events 03:00 - 1,408 events Audit Findings All sampled audit events show: LogonType = 0 (Owner) UserId = affected mailbox owner Result = Succeeded I sampled 5,000 records and all of them were: LogonType = 0 No events were recorded as: LogonType = 1 (Admin) LogonType = 2 (Delegate) Source and Destination Folders Examples from mailbox audit records: Folder : \Sent Items Destination : \Deleted Items Operation : MoveToDeletedItems Message Trace Findings Extended Message Trace was performed on one of the affected emails. The trace confirmed: CopiedToSentItems=True DeleteAfterSubmit=False which indicates: The email was successfully sent. The email was copied to Sent Items. Exchange did not delete the message during transport. So the message existed in Sent Items and was later moved to Deleted Items by a mailbox operation. Rules Investigation Checked: Get-InboxRule -Mailbox <mailbox> -IncludeHidden Findings: No Inbox Rules targeting Sent Items. No hidden Inbox Rules targeting Sent Items. Only two legitimate rules that delete messages from specific Jira/Confluence senders. Delegation Investigation Mailbox permissions reviewed. Known permissions exist, but mailbox audit logs show: 5000/5000 sampled events = LogonType 0 Therefore: No evidence of delegate activity. No evidence of administrative activity. Retention / Compliance Investigation Checked: Get-Mailbox Get-RetentionPolicy Get-RetentionPolicyTag Get-RetentionCompliancePolicy Get-RetentionComplianceRule Findings: No Sent Items retention tag. No retention policy targeting Sent Items. No Purview retention/compliance policy appears to explain this behavior. Activity pattern does not resemble normal retention processing. Add-ins Investigation Mailbox add-ins: Polls Share to Teams Send to OneNote Action Items Bing Maps My Templates Unsubscribe No third-party mailbox-management or archiving add-ins found. Client Information Seen During Investigation Examples observed in mailbox audit logs: Client=OutlookService;MacOutlook/16.112 a { text-decoration: none; color: #464feb; } tr th, tr td { border: 1px solid #e6e6e6; } tr th { background-color: #f5f5f5; } What Has Been Ruled Out ✅ Admin activity ✅ Delegate activity ✅ Inbox Rules ✅ Hidden Inbox Rules ✅ Outlook add-ins ✅ MRM retention policies ✅ Sent Items retention tags ✅ Purview compliance retention policies ✅ Exchange transport deleting the messages Question Has anyone encountered a similar case where: Thousands of messages were moved from Sent Items to Deleted Items Operation = MoveToDeletedItems LogonType = 0 (Owner) No rules No retention policy No delegate activity particularly involving: Outlook for iOS Outlook for Mac Client=OutlookService Any similar experiences, findings, or recommendations would be greatly appreciated. As we need to know the root cause for this issue. Thanks
User can't see some emails after loading PST
Recently I helped a user migrate from an IMAP mail to Outlook. I downloaded the PST file from the old IMAP account and loaded the file into his new account, all in Classic Outlook as this user refuses to use the new Outlook. However, during the load of old mail he would stop receiving any new mail. To fix this I created a new profile and that did allow new mail to arrive, however, the mail from the backup didn’t show. I then loaded the backup into the new Outlook and it only loaded mail up to 2022. After this, we loaded the PST into Outlook Classic on a different device as to not disrupt workflow, but that also didn’t solve the issue. I loaded the PST file into a testing account, and it did load all the files, from 2020 to the date the file was created.
Outlook.de DKIM and DMARC records broken
Outbound mail from outlook.de carries a DKIM-Signature with d=OUTLOOK.DE; s=selector1, but the corresponding DNS TXT record at selector1._domainkey.outlook.de does not exist. This causes receiving servers to report dkim=permerror (no key for signature). To reproduce: Send a mail from any @outlook.de account Check the DKIM-Signature header — it references selector1 Run: dig TXT selector1._domainkey.outlook.de — no record returned The domain outlook.de also has no DMARC record published (dmarc=none). Some header information: Received: by 2002:a05:6a11:e41c:b0:73b:6833:703f with SMTP id em28csp1732536pxc; Tue, 21 Jul 2026 07:23:10 -0700 (PDT) [...] ARC-Authentication-Results: i=2; mx.google.com; dkim=permerror (no key for signature) header.i=@OUTLOOK.DE header.s=selector1 header.b=mWWTJtqO; arc=pass (i=1); spf=pass (google.com: domain of email address removed for privacy reasons designates 2a01:111:f403:d20f::3 as permitted sender) [...] I leave out DNS this time as the discussion was marked as spam, but you can easily check it yourself: dig TXT selector1._domainkey.outlook.de and dig TXT _dmarc.outlook.de return no entries as all. So obviously the DNS records are not published. This leads to bad email reputation - so emails are either in SPAM folders or get rejected completely. Can someone from MS look into this and fix it. This is at least the case since June 2026 - see also https://borncity.com/blog/2026/07/02/patzt-microsoft-bei-dkim-fuer-outlook-de/ (which is in German unfortunately) - but that is the exact issue.
腾龙公司游戏官网
现场负责人威性【 u a a 2 2 0 0】 🐧 【 3 9 8 1 1 1 5 1 0 1】 1、注恻流程详细了解微信: 【a a 9 9 9 5 521 1 1 】 开设腾龙公司的账户通常涉及以下几个步骤， 2、填写申请表格，您可以在腾龙公司的官方网站-点——浏览器——上下载并填写申请表格,或直接在腾龙公司的营业现场部填写。 3、提交开户所需文件:完成申请后准备所需的文件，这通常通过身份证明文件以及地址证明文件、银行账户信息等。这些文件需要提交给腾龙公司，可以选择在营业部现场提交或通过邮寄方法提交。 4、开设账户，提交必要的文件后,您需要按照腾龙公司的指示进行开户流程，这可能包括提供手机号码、验证短信、设置密码等步骤。 5、账户验证,完成所有必要的信息并同意相关协议后您的账户即可开通。 6、请注意,具体的开户流程可能因公司和地区的不同而有所不同，因此建议直接访问腾龙公司的官方网站获取最准确的信息Shared Calendars No Longer Visible
For years, I've shared Outlook calendars between my Outlook accounts and with my husband's, without any issues. However, since mid-June the shared calendars have disappeared for no apparent reason. The sharing permissions are still in place, but the calendars are no longer visible or available to add on Android, in the Outlook desktop app, or on Outlook on the web. I've spent hours Googling and tried all the usual troubleshooting steps, but nothing has worked! As a workaround, I now have to invite all @outlook.com accounts to calendar events just so everyone can see them and avoid double bookings. Has anyone come across this before and found a fix that isn't one of the standard "how-to" suggestions? Note: these are personal paid Microsoft accounts.Teams Meeting Add-in Not Appearing in Outlook
The computer was rebuilt from scratch and reinstalled with a clean operating system. After the installation, all required Microsoft applications (Outlook, Teams, etc.) were installed and the user successfully signed in. However, the Teams Meeting add-in is not appearing in Outlook as expected. Within the Outlook Calendar/Appointment window, only the Skype Meeting option is visible, while the Teams Meeting option is completely missing. Checks Performed: New Microsoft Teams is installed and functioning properly. Outlook and Teams are both signed in with the user account. Outlook COM Add-ins have been checked. Disabled Items have been checked. Teams Meeting Add-in for Microsoft Office has been verified. Outlook updates have been checked. Microsoft Teams has been reinstalled. Outlook profile has been verified. Exchange mailbox is active and functioning correctly. Despite all the above checks, the Teams Meeting option is still not displayed in the Outlook Calendar/Appointment window, and only the Skype Meeting integration is available. Expected Behavior: The Teams Meeting button should be available within the Outlook Calendar/Appointment window, allowing users to create Teams meetings and automatically generate Teams meeting invitations. Request: Please why the Teams Meeting Add-in is not being loaded into Outlook and provide assistance in restoring the Teams Meeting functionality within the Outlook Calendar/Appointment interface. Attachments: Screenshot showing the current issue (Teams Meeting button missing) Screenshot showing the expected behavior (Teams Meeting button visible)Is a COM add-in the only way to add an add-in to a Gmail/IMAP account in classic Outlook?
I have an Outlook web add-in (Office.js, MailApp) that works fine on Exchange Online mailboxes. But on a Gmail account added to classic Outlook for Windows via IMAP, the add-in never activates, as I understand it, web add-ins need an Exchange backend to activate against, which an IMAP account doesn't have. Is that correct? And if so, is a traditional COM add-in (VSTO) the only supported way to surface an add-in on these IMAP/POP mailboxes in classic Outlook, or is there a web-add-in path I'm missing?
My Outlook for Mac HTML email reply quoted body blank, only headers show
I've been using Legacy Outlook for Mac for years without issues, but since Wednesday afternoon (June 17, CET) something broke after the latest update rolled out. When I reply to any HTML email, the quoted original message is completely blank. Only the From, Date, To and Subject headers show up — the actual email body is gone. It makes it impossible to have a proper email thread because the recipient can't see the conversation history. This started right after Version 16.110 (Build 26061317) was released on June 16, 2026. The release notes only mention "Quality and performance improvements" for Outlook, so whatever changed in this build seems to have broken HTML reply quoting as an unintended side effect. My setup: MacBook Air M5, macOS (Legacy Outlook for Mac Exchange on-premises account (EWS), domain login What I'm experiencing: Replying in HTML mode → quoted body is completely blank, only headers show Switching to plain text → body comes back but with massive blank line gaps throughout (not professional to send) Outlook Web (OWA) → works perfectly fine What I've already tried: Cleared app data (Document Cache + Experimental Features) — no fix Cleared Outlook cache manually — no fix Toggled composing settings — no fix Checked settings in Preferences → Email → Composing — everything looks correct I've also tested Apple Mail as an alternative but it breaks embedded signature images (CID images show as placeholders), and it doesn't support Teams meeting integration — so going back to Legacy Outlook is really the only option for my daily work. Outlook Web App OWA is my current workaround but it's not sustainable long term. I really hope this can be looked at as a regression fix in the next update. Has anyone else experienced this since the June 16 build? Does anyone has this issue as well?
Shared Outlook Calendar disappeared
An Outlook Calendar that my wife and I share has suddenly disappeared from my Outlook Calendar. It still shows on my wife's computer. We set this up a number of years ago, so I have no idea where or how to troubleshoot this. I do recall that we had to each create outlook.com email addresses so that we could access Microsoft Exchange. We are using the Classic version of Outlook. In case it's useful, here's the exact information from the Outlook About page: "Microsoft® Outlook® for Microsoft 365 MSO (Version 2605 Build 16.0.20026.20168) 64-bit." Thanks to anyone who can help me solve this problem.15 productivity features in the new Outlook for Windows
Hello, Outlook community. I’m Vicki Milton, a Principal Product Manager on the Outlook team. Over the last year, we’ve added important capabilities across areas such as offline support, shared mailboxes, and PST files. Alongside those milestones, we've continued to deliver smaller improvements that help people work more efficiently throughout the day. This article highlights 15 productivity features in the new Outlook for Windows that can help you stay organized, reduce routine effort, and keep important work moving. Mail features Email remains central to how many people manage communications, priorities, and follow-up. Outlook includes familiar tools for composing and organizing messages, along with newer capabilities that can help reduce friction and make inbox management more efficient. Pin a mail: Keep important messages easy to find. The Pin feature keeps a selected email at the top of your inbox so it remains visible as new messages arrive. This can be useful for items you need to reference often or do not want to lose track of, such as travel details, approvals, or active requests. By keeping priority messages in view, Pin can reduce time spent searching and help you stay focused on current work. Snooze a mail: Return messages when they are relevant again. Snooze lets you temporarily remove an email from your inbox and have it reappear at a time you choose. This can help keep your inbox focused on messages you can act on now while ensuring follow-up items come back when they are timely. It is particularly useful for requests that depend on additional information, scheduled tasks, or work you plan to handle during dedicated focus time. Add multiple categories at the same time: Organize messages with fewer steps. If you use categories to manage incoming mail, Outlook makes it possible to apply more than one category in a single action. This can help when you need to capture multiple types of context, such as project, priority, or follow-up status, without reopening menus repeatedly. It is especially useful when processing a large number of messages. Sweep: Reduce repetitive inbox cleanup. Sweep lets you create automatic actions for messages from a specific sender. For example, you can delete promotional mail after a set period, keep only the latest message in a thread, or move recurring updates to a folder. This can help reduce manual cleanup and keep your inbox more focused on items that need attention. Schedule Send: Write on your schedule and deliver at the right time. Schedule Send lets you prepare messages when it is convenient for you and send them later at a time that works better for the recipient. This can improve visibility, support more intentional communication, and reduce the need to rely on reminders or leave messages in Drafts. Simplified folder sharing: Share folders more simply. Sharing a mail folder has traditionally required extra permission steps, especially for nested folders. Now, when you share a folder, Outlook can automatically apply the visibility permissions needed for its parent folders. This can reduce setup effort, help avoid access issues for recipients, and make folder sharing easier to complete with confidence. Calendar and meeting features For many people, the workday is shaped by meetings, schedule changes, and the need to stay aligned on what comes next. Outlook includes calendar and meeting capabilities that can help simplify planning, reduce coordination overhead, and make follow-up easier. Follow a meeting: Stay informed without attending live. The Follow RSVP option lets you indicate that you will not attend a meeting but still want access to the recap. This can be helpful when schedules overlap or when a meeting is useful to monitor without joining in real time. It can help you stay connected to outcomes and shared materials while keeping your calendar more manageable. Save calendar views: Return to the calendar setup you need more quickly. Saved Views let you store specific calendar combinations and switch back to them without rebuilding the same view each time. This can save time for people who move frequently between personal, team, and project schedules. It also can make it easier to review the right set of calendars for different planning tasks. Improved meeting tracking: Work with meeting responses more efficiently. Outlook includes tools that make it easier for organizers to review and manage meeting responses. You can sort attendee lists, search for names in the Tracking view, and copy or download response details when needed. These capabilities can be especially useful for larger meetings where attendance information needs to be reviewed quickly. Meeting recap: Find follow-up materials in one place. After a Teams meeting, the calendar event in Outlook can surface a Meeting recap with links to the recording, transcript, and shared files. This can make it easier to review what was discussed, confirm details, or catch up afterward. By keeping these materials together, Meeting recap can reduce the time it takes to get oriented after a meeting. Filtered views: Reduce visual clutter in your calendar. Filters let you hide meetings you are not attending and limit the distraction of declined or informational events. This can make it easier to scan your schedule, identify conflicts, and focus on the meetings that need your attention. For people with full calendars, it can help make planning more straightforward. Change a recurring event: Update future meetings while preserving earlier ones. When plans change, Outlook lets you edit the current event and all following events in a recurring series. This can make it easier to adjust details such as time, location, or agenda going forward without changing the record of past meetings. It can simplify updates for organizers and reduce disruption for attendees. Personalization and settings Settings can play a practical role in day-to-day productivity. A few adjustments can make it easier to focus, move between accounts and calendars, and work in a way that fits your preferences. Here are several settings-related features that can help make Outlook feel more streamlined and manageable. Rename your email accounts: Make the right inbox easier to recognize. If you use multiple accounts in Outlook, you can assign each one a custom name. This can help you tell accounts apart more quickly, reduce the chance of sending from the wrong inbox, and make navigation simpler as you move between accounts during the day. Modern themes: Choose a look that supports comfort and clarity. Outlook includes theme and color options that let you tailor the experience to your preferences. Visual settings can influence readability and comfort, especially for people who spend much of the day in email and calendar. Options such as Dark Mode and color customization can help make the interface feel easier to use over time. Keyboard shortcuts: Keep familiar ways of working. In Outlook, you can choose the shortcut style you prefer in Settings. This can help you maintain existing habits, reduce adjustment time, and complete common tasks with fewer steps. For people moving from classic Outlook or Outlook on the web, shortcut flexibility can make the transition more consistent. These features reflect a broader effort to help people work more efficiently in the new Outlook for Windows. Whether you are managing a high volume of email, coordinating a full calendar, or tailoring the experience to match your workflow, these updates are designed to reduce effort and improve day-to-day productivity. For more information and step-by-step guidance, see the Microsoft Support articles and the Learning Path.
