Stop ASP.NET SMTP Emails from Appearing in Office 365 Sent Items Without Affecting Manual Sends
We are sending Emails to our clients through an ASP.NET application using the SMTP protocol and using an O365 Account (email address removed for privacy reasons). The problem is that every time a mail (reset password, otp, campaigns, etc) is sent from asp.net application, a copy of that mail is created in the "Sent Items" of the Support mailbox. This is not needed and it is quickly filling our Support mailbox. How to stop this? Is there any setting in the Exchange Server? Please note that the Support mailbox is also used by our company support representative to send resolutions to customers using O365 Outlook Web Access. The mails send by the representative are very much needed in the sent items. It's only the ASP.NET-sent mails that we want to prevent in the "Sent Items".
Problem with Teams and Exchange Integration
Hi everyone, My goal is to integrate Exchange Server (Exchange 2016 CU23) with Teams so that the Teams calendar can be used. I have set up Hybrid Configuration (Classic Full Hybrid) and completed the setup without any errors. I have also checked Entourage, and it shows that Exchange has been registered, but the Teams calendar is still not working. Check items: 1. Get-AuthServer 2. Get-IntraOrganizationConnector → Confirm the "Enabled" status. 3. Get-PartnerApplication → Confirm it's enabled. 4. External resolution of the Autodiscover and EWS virtual directories 5. Run Teams Exchange Integration → The only thing that works is "Verifying if the user's mailbox is discoverable by the Teams service," and everything else is fine.The user's mailbox is not discoverable by the Teams service. Please ask your administrators to verify the user has a mailbox and to confirm the connectivity between Teams and Exchange. Does anyone have any other ideas or suggestions to help me? Thanks!
Free/Busy Hybrid Exchange 2019
Hello everyone, I have a hybrid environment with Exchange Server 2019, with a dedicated Exchange application, we renewed the Exchange Auth certificate and then re-ran the HCW, however, free/busy is not working for 365 Pro local users. Has anyone had this problem? Could you help me?
Why would a hacker/scammer put a domain INTO my exchange online admin?
OK so this is a weird one. I've been doing this a fairly long time but I'm not a full time exchange admin. I help my clients with exchange online often, but I'm a local IT pro, doing all sorts of screwdriver and software work, not just exchange. So maybe this isn't as bizarre as I think it is, but let's see. My client stopped receiving email 2 days ago. Alerted me to it yesterday. They don't know their password but no devices are asking for passwords, so I suspect it's not a password issue. I get logged into my admin and reset their password so we can get into their account. Suddenly they start getting asked for PW on phone and outlook, so we know that the password hadn't been changed prior. I get into account and see new rules sending all emails into archive and trash. So that explains that. So someone broke into the account with the correct password. Easily enough explained. Though weird that it would happen if the user didn't know their own password. So, one question is how did the scammer get into the account. I have looked at the login logs but I don't know what to sort/filter by to really find out anything helpful. Any ideas? So I got into the account and upon resetting his password he is forced to enable MFA. So that's done. I'm in the admin and what do I find? Two NEW domains in the settings. They are set up for exchange online. No users though. Not only that but I can't REMOVE the domains that aren't mine. I get this error when trying to remove it: "The domain coburnsfleetservices.com can't be removed at this time because it was purchased from Microsoft 365. It can only be used with your current Microsoft 365 account. You can remove it from the account once the subscription expires or is canceled." Also, in the emails missed in the past 48 hours we got one that said this: "A verified domain was added to your Avenue A Realty Advisors LLC account If this domain wasn't added by an admin in your organization, credentials might have been compromised and we suggest reviewing your password and multifactor authentication settings." I searched online and found contact info for one of the stolen/given domains. Called them and they said they had been hijacked 2 weeks ago, and their email used to send out payment requests to thousands of email addresses. Thought they had it solved a few days ago and it had been silent. Now this. So a second thing I'd like to find out is when exactly those domains were put into my exchange online account. Can I find that info from the logs? Additionally, WHY would someone move unrelated domains into my account? Maybe is the assumption that that happened before 2 weeks ago when that company's domain had been used to send out mass mail? Doesn't seem possible, because that company would have figured out that they no longer controlled their own domain and they couldn't have gotten control of the account again. Or...? I don't know. But while I've seen users tricked into giving out their passwords dozens of times, and their email used to try to solicit money from vendors, I've never seen another domain slipped in. Any ideas? And suggestions how to search the logs to get to the bottom of the missing puzzle pieces? Thanks for any leads!
How do you identify the "You've joined the xxx group" emails?
When you join a microsoft 365 group via Outlook you get an email (apparently from yourself) to say you have joined it. How do you actually identify these emails on Exchange? I've looked at the headers but nothing really stands out. I need to exclude these types emails from rules.
Exchange 2019 Mailbox Migration Error - Folder conflicts with Exchange Online folder
Hi Exchange Experts, I'm migrating a small Exchange 2019 environment to 365. Been pulling my hair out becuase of just one mailbox giving this error Error description --------------------------- Error: AggregateMailboxFolderConflictPermanentException: The folder 'Files' conflicts with Exchange Online folder 'Files', please move the messages to another folder and restart the job. Data migrated: 0 B (0 bytes) Migration rate: -------------------------------------- Migration user report: 5/14/2025 12:32:05 PM [MEUP300MB0105] Request processing continued, stage CreatingFolderHierarchy. 5/14/2025 12:32:05 PM [MEUP300MB0105] Stage: CreatingFolderHierarchy. Percent complete: 10. 5/14/2025 12:32:12 PM [MEUP300MB0105] Stage: CreatingFolderHierarchy. Percent complete: 10. 5/14/2025 12:32:12 PM [MEUP300MB0105] Fatal error AggregateMailboxFolderConflictPermanentException has occurred. ---------------------- It seems to be a system folder and I've tried to remove files from it (although there're no files in it) using MFCMAPI tool with no success. Renamed the folder and tried to re-run the migration with no luck. Has anyone experience this issue? any thoughts or tips are much appreciated ! Thank you.
Exchange 2016 to SE and Exchange Online questions
Hi, We're currently in the process of migrating from Exchange 2016 to Exchange Subscription Edition (SE), along with moving a portion of our mailboxes to Exchange Online. We have approximately 3,000 mailboxes, and around 2,000 of those will eventually end up in Exchange Online—for various reasons (don’t ask why…). I have a few questions I'd like to clarify and hope you can assist: Exchange On-Premises Questions: If a user mailbox is moved to Exchange SE, can they still access shared or user mailboxes that remain on Exchange 2016? Do we need to migrate them in the same batch to preserve access/permissions? (should't be an issue in the same Exchange Org right?) If a shared mailbox is migrated to Exchange SE while the user mailbox remains on Exchange 2016, will access still work? Do we need to point the Hardware Load Balancer (HLB) to the new Exchange SE servers before mailbox moves to allow proper client connectivity and proxying back to Exchange 2016? Or is it okay to keep the HLB pointed to the Exchange 2016 servers until all migrations are complete and then switch it over? Proxy upwards from Exchange 2016 to Exchange SE? What’s the best practice here? Pros/cons? Exchange Online Questions: If we want all outbound mail to go through the on-prem Exchange environment—even for Exchange Online mailboxes—is this configured via the Hybrid Configuration Wizard (HCW)? Is the Litigation Hold status preserved when migrating a mailbox to Exchange Online? Can a mailbox hosted in Exchange Online access a shared mailbox still residing on-prem? (Should't be an issue right?) Can an on-prem mailbox access a shared mailbox that has been migrated to Exchange Online? For mailboxes with Full Access or Send As permissions (e.g. user mailboxes tied to shared mailboxes), do they need to be migrated together in the same batch to retain functionality? We’ll be using native Microsoft migration tools (no 3rd-party solutions). If I recall correctly, separate migrations will still allow Full Access?!?, but Send As may not work properly unless migrated together. Is that still accurate?Send admin notifications on x number of messages from an email address
Hi, We're having a problem with a repeat spam/phishing offender that recycles email addresses from a particular domain. Because the email address is new it hasn't had a chance to be picked up by blacklists, so it doesn't get picked up as spam. We can't block on content, subject or sender because it all changes so for these campaigns we're relying on user reports to give us the heads up. We also can't block the domain because we receive legitimate email from the domain also. I'd like to change this so we can hit them before users notice and possibly whilst the spam campaign is in flight but I'm unsure as to how to go about it. Is there a rule or other setting I can configure which sends notifications to specific e-mail addresses if, say 100 emails were received from any email address (or from a specific domain?) within an hour, or 5 hours? I don't see how I can configure such a rule in mailflow rules so I'm guessing this might be somewhere else. There's an element of us likely being falsely alerted to marketing campaigns, but hopefully it's configurable enough that we can limit it down to only applying this against a specific sender domain, or adding a new custom mailflow rule which will lower the likelihood of false positives. Many thanks, - Lsward
