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Can Exchange server and office 365 coexist?
Hi, So, to give you an idea of what is our situation. We are a small business with a limited number of users. Currently we have an exchange e-mail address for all users. We would like to migrate two of our users to office 365, their mail address may vary but, we'd like to keep te same domain. Is it possible to for example create a new dns record and make email addresses like "newmailaddress@currentdomain"? Of course, we don't want the current mail setup to fail at any point. Obviously, it's impossible to keep the same mail adres this way. But i was wondering if i could create new mail addresses like this. That way i could also use this method for new employees. Thanks in advance for your advice!SolvedIbisnoctuaMar 19, 2025Copper Contributor119Views0likes7CommentsExchange Online Restricts the Number of Dynamic Distribution Groups
Exchange Online is imposing a new tenant-wide limit of 3,000 Dynamic Distribution Groups. Few tenants might be affected, but the question might be asked why Microsoft is limiting DDGs at this point. Is it a cunning plan to prompt people to use dynamic Microsoft 365 groups instead? Or are some tenants abusing DDGs in weird and wonderful ways? Who knows, but the limit applies from early April 2025. https://office365itpros.com/2025/03/10/dynamic-distribution-groups-limit/199Views1like4CommentsWhy Only Web-Based Outlook Clients Can Recall Encrypted Email
The new message recall facility has been around since 2022. Even after Microsoft revamped the feature in 2023, it’s still only possible to recall protected messages with OWA and the new Outlook. As it turns out, the reason is that a premium license is needed, and Outlook classic might need some new code to check for that license. In other news, Outlook mobile now supports message recall. https://office365itpros.com/2025/03/13/message-recall-protected/50Views0likes2CommentsExchange health set unhealthy
Hello everyone! Some healthprobes on our Exchange 2016 Server have been reporting an unhealty state since the middle of February. OAB.Proxy, EWS.Proxy, Outlook.proxy and OutlookMapiHttp.Proxy. We have no mailboxes on the server, so its not critical, but I would still like to figure out what is going on. They all fail with "The remote server returned an error: (401) Unauthorized" and if I try to invoke the probe i see this in the response: It looks like the SSL validation is not happening. Is it normal for the probe to use localhost for this? When I run "Get-WebServicesVirtualDirectory" both internal and external virtual directry is set to our external url. Any insight is greatly appreciated!GlyMar 17, 2025Brass Contributor134Views0likes4CommentsTime to Remove the Old Report Message Add-Ins
Microsoft says that the Report Button is now available for all Outlook clients and it’s time to remove the old Report Phishing and Report Message add-ins. A note in the documentation says that the old add-ins are unsafe, but Microsoft is probably more concerned about getting rid of COM-based add-ins. In any case, a single button to handle all aspects of reporting suspicious email seems like a good idea. https://office365itpros.com/2025/03/17/report-button-outlook/28Views0likes0CommentsAfter Exc 2019 Cu15 update Outlook problem
After the Exchange 2019 CU15 update, Outlook 2016 or Outlook 2021 keeps asking for a password. When I check the operating systems, I see that they are versions up to Windows 10 Pro 1607 and 22H2. I wonder if there is a feature that affects older operating systems? Do you have any ideas?SolvedNetworker_ExchangeMar 17, 2025Copper Contributor173Views0likes2CommentsUnable to Receive System-Generated Emails
Can anyone help me on this. We're currently using Exchange Server 2013. We have issue where system-generated emails are not being received but we are able to receive emails from users email with the same domain name. TIAJMPIJANAMar 17, 2025Copper Contributor280Views0likes1CommentMessage submission rate - Avoid spam sending
Hello everyone! I am looking for a way to set a limit on the number of messages sent per hour (or per minute) in Exchange 2016/2019. Analyzing the documentation below, I configured the Message rate limit per user, but it had no effect. Ref: Message rate limits and throttling | Microsoft Learn When sending a number of messages greater than the configured limit, we receive the message "4.4.2 Message submission rate for this client has exceeded the configured limit," but all the messages are sent normally. I would like to know if there is any way to limit the number of messages per account in order to prevent spam from being sent through our environment. Any suggestions? Tks!FabioS2210Mar 17, 2025Copper Contributor309Views0likes1CommentIssues after Exchange 2019 CU15 install
Hello, We have some issues with our Exchange server. After CU15 install we have high(er) CPU usage at the server and slow(er) Outlook (online no cache mode enabled) connection at the client. MAPI over HTTP and Exchange Extended Protection is enabled. Have anybody else who have the same issues?Antal_KabatekMar 15, 2025Copper Contributor528Views0likes5CommentsExpose ResourceDelegates in OWA Settings > Calendar > Resource Scheduling
Expose ResourceDelegates in OWA Settings > Calendar > Resource Scheduling · Community I'm posting this here in hopes of getting votes over at the feedback site. What I'm after as a solution is this: 1.) Room "Owners" be granted FullAccess (ideally with AutoMapping disabled). 2.) Room "Owners" open room mailboxes in OWA and manage both Calendar permissions, and Resource Scheduling options (a.k.a., Booking Options), entirely themselves. 3.) Admins are relieved of the burden of having to do all this work for Room "Owners" because some of the settings are hiding in PowerShell only. We're almost there in EXO's OWA options > Calendar > Resource Scheduling. We're just missing ResourceDelegates: I suppose additional checkboxes could also be added to cover off all the other settings available in Get-/Set-CalendarProcessing, but for me ResourceDelegates is the most vitally important one. In large orgs, the ability to truly hand off responsibility of these settings to a room owner will be a huge administrative overhead relief.JeremyTBradshawMar 15, 2025Steel Contributor35Views0likes1Comment
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