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Missing emails
Got a weird one here and hoping someone else has seen this before. Scenario: Internal user sends an email to about 15 other internal users. I see the sent item in message trace, delivering successfully for all recipients. Days later, the sender and recipients can not locate the item in their mailboxes. I spot check one of the recipients and perform as thorough of a search on their mailbox as I can and am unable to locate it. All recipients claim to have not permanently deleted the item. What I've done: I did multiple content searches with scopes of varying depth, none of them have found the item. I checked audit logs for 'move to deleted' and 'delete from deleted', nothing. I checked Defender to see if the item had any post delivery processing performed, nothing. The trace shows successful delivery, Explorer in Defender portal shows the same, yet the item is undetectable. I don't know what I'm missing as far as what system could have snagged that item out of the mailboxes, which I'm assuming happened since the content searches are coming up empty. For the affected users, there are no commonalities regarding delegate access. There are 3 administrative users for the environment - none recall performing any purge for this item. There are no logs of a purge of this item that I can find.
Shared Mailbox can have a password and login enabled without license
I'm very much aware of the license requirements for Shared Mailboxes in Exchange Online and for all Shared Mailboxes we always give licensed users access to them. If we need to login to the actual shared mailbox, we assigned them a license. This could be necessary if you also have some 3rd party application that actually need to login to the mailbox and fetch e-mail for some reason. I have recently realized that you CAN actually set a password to a Shared Mailbox. Just go to admin.microsoft.com > Users > Active Users > select the Shared Mailbox > Reset password. After this, you can login with the username/password. Of course, if you access it via portal.office.com you won't see Outlook but if you go directly to outlook.office365.com you will get access to the mailbox. Anyone know anything more about this feature? Limitations? I'm not looking to break the licensing terms, all our physical users for all our customers have their own personal accounts but there are scenarios where you have a 3rd party application accessing the mailbox for some reason.How to Find Active EWS-Based Apps in a Microsoft 365 Tenant
Microsoft will retire Exchange Web Services (EWS) from Exchange Online on October 1, 2026. A new usage report helps tenants understand what apps use EWS. Many of the apps are likely to be first-party (Microsoft) apps, but some might be third-party apps developed externally or internally. Those apps need to be retired or upgraded to use Graph APIs. Time is slipping away to do the work. https://office365itpros.com/2025/04/29/exchange-web-services-apps/Use an OWA Mailbox Policy to Block Attachment Download for the New Outlook for Windows
The ConditionalAccessPolicy setting in an OWA mailbox policy can be configured to work with Entra ID conditional access so that OWA blocks access to attachments on unmanaged devices. Microsoft originally introduced the feature in 2018 and as it turns out, the combination of OWA mailbox policy and CA policy also blocks attachment access for the new Outlook for Windows client. https://office365itpros.com/2025/05/13/owa-mailbox-policy-new-outlook/Microsoft Changes Strategy for High Volume Email
A surprise announcement brings the news that the Exchange Online High Volume Email (HVE) solution will only deliver messages to internal recipients from June 2025. Azure ECS is now the sole offering for sending large volumes of email to external recipients. On the upside, HVE will support basic authentication until September 2028 to give tenants the chance to upgrade devices and apps. https://practical365.com/hve-new-strategy/
Missing Sent Items after IMAP Migration
Hello, I current did a migration from IBM Domino onpremise mail server to exchange online. The migration is still underway but there are some earlier migration batches (used IMAP as migration method) that show the sync is perfect and even shows number of items migrated. On the users end they are only able to see all their inbox mails from the previous mail server (IBM Domino). What could be the issue in this case? I have done multiple migrations but haven't seen such an issue before. Any ideas are highly appreciatedExchange Hybrid Wizard won't run
Hi all, 2 x Exchange 2019 (CU 14 and April SU) in a dag Windows Server 2022 I'm trying to run the Hybrid Configuration Wizard but nothing happens. From one of the servers I go to https://aka.ms/HybridWizard. Using Edge it offers to Open Microsoft.Online.CSE.Hybrid.Client.application but nothing happens when I click Open. I downloaded the application and tried to run it manually but absolutely nothing happens. Nothing in the event logs to say why nothing happened. I had a look and ClickOnce Application Deployment Support Library is the default to open .application files. Tried using the old IE to run it (as some posts online suggest) but again nothing happens. If I run the application from another PC (Windows 10), it attempts to run but fails and I get the error: Deployment and application do not have matching security zones Has anyone else had this issue and was able to resolve? thanks justin EDIT: I am looking at doing the Classic Full hybrid.
exchange 2019 send to person not save in sent item
Hi, I have problem in organization with exchange 2019. I have user then send mail to outside one domain, mail not save in sent items. Tracking logs show is this mail send to customer. Customer recive this mail but not in mailbox user sent items. #TYPE Selected.Microsoft.Exchange.Management.TransportLogSearchTasks.MessageTrackingEvent "Timestamp","Sender","Recipients","MessageSubject","EventId","ServerHostname" "06.05.2025 09:10:45","email address removed for privacy reasons","user@customer.domain","FW: new order_season 2025","RECEIVE","exchange" "06.05.2025 09:10:46","email address removed for privacy reasons","user@customer.domain","FW: new order_season 2025","HAREDIRECT","exchange" "06.05.2025 09:10:46","email address removed for privacy reasons","user@customer.domain","FW: new order_season 2025","RECEIVE","exchange" "06.05.2025 09:10:46","email address removed for privacy reasons","user@customer.domain","FW: new order_season 2025","SUBMIT","exchange" "06.05.2025 09:10:46","email address removed for privacy reasons","user@customer.domain","FW: new order_season 2025","AGENTINFO","" "06.05.2025 09:10:46","email address removed for privacy reasons","user@customer.domain","FW: new order_season 2025","TRANSFER","exchange" "06.05.2025 09:10:53","email address removed for privacy reasons","user@customer.domain","FW: new order_season 2025","SENDEXTERNAL","m.net" "08.05.2025 09:33:17","email address removed for privacy reasons","user@customer.domain","RE: new order_season 2025","RECEIVE","exchange" "08.05.2025 09:33:17","email address removed for privacy reasons","user@customer.domain","RE: new order_season 2025","HAREDIRECT","exchange" "08.05.2025 09:33:17","email address removed for privacy reasons","user@customer.domain","RE: new order_season 2025","RECEIVE","exchange" "08.05.2025 09:33:17","email address removed for privacy reasons","user@customer.domain","RE: new order_season 2025","SUBMIT","exchange" "08.05.2025 09:33:17","email address removed for privacy reasons","user@customer.domain","RE: new order_season 2025","AGENTINFO","" "08.05.2025 09:33:17","email address removed for privacy reasons","user@customer.domain","RE: new order_season 2025","TRANSFER","exchange" "08.05.2025 09:33:27","email address removed for privacy reasons","user@customer.domain","RE: new order_season 2025","SENDEXTERNAL","mxw.net" "08.05.2025 10:19:55","email address removed for privacy reasons","user@customer.domain;user@customer.domain","RE: shipping documents xxx #20","RECEIVE","exchange" "08.05.2025 10:19:55","email address removed for privacy reasons","user@customer.domain;user@customer.domain","RE: shipping documents xxx #20","HARECEIVE","exchange" "08.05.2025 10:19:55","email address removed for privacy reasons","user@customer.domain;user@customer.domain","RE: shipping documents xxx #20","SUBMIT","exchange" "08.05.2025 10:21:04","email address removed for privacy reasons","user@customer.domain;user@customer.domain","RE: shipping documents xxx #20","HADISCARD","exchange" "08.05.2025 10:27:36","email address removed for privacy reasons","user@customer.domain;user@customer.domain","RE: combined shipment: xxx ","RECEIVE","exchange" "08.05.2025 10:27:36","email address removed for privacy reasons","user@customer.domain;user@customer.domain","RE: combined shipment: xxx ","HARECEIVE","exchange" "08.05.2025 10:27:36","email address removed for privacy reasons","user@customer.domain;user@customer.domain","RE: combined shipment: xxx ","SUBMIT","exchange" "08.05.2025 10:29:09","email address removed for privacy reasons","user@customer.domain;user@customer.domain","RE: combined shipment: xxx ","HADISCARD","exchange" "09.05.2025 15:22:38","email address removed for privacy reasons","user@customer.domain","RE: xxx","RECEIVE","exchange" "09.05.2025 15:22:38","email address removed for privacy reasons","user@customer.domain","RE: xxx","HAREDIRECT","exchange" "09.05.2025 15:22:38","email address removed for privacy reasons","user@customer.domain","RE: xxx","RECEIVE","exchange" "09.05.2025 15:22:38","email address removed for privacy reasons","user@customer.domain","RE: xxx","SUBMIT","exchange" "09.05.2025 15:22:39","email address removed for privacy reasons","user@customer.domain","RE: xxx","AGENTINFO","" "09.05.2025 15:22:39","email address removed for privacy reasons","user@customer.domain","RE: xxx","TRANSFER","exchange" "09.05.2025 15:22:56","email address removed for privacy reasons","user@customer.domain","RE: xxx","SENDEXTERNAL","mx.ner" I cant target this problem. Thansk for answers DS
The Downside of Losing the Exchange Mailbox Audit Search Cmdlets
Microsoft recently announced the deprecation of the Exchange cmdlets to search for mailbox audit data. The audit data is ingested into the Microsoft 365 unified audit log, but it’s more difficult to find and retrieve Exchange mailbox audit events. Methods are available to find mailbox audit data, but interpreting what comes back is different. Any script that depends on the old cmdlets must be updated to interact with the unified audit log. https://office365itpros.com/2025/05/08/exchange-mailbox-audit-data/
