After 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?
Arbitration Mailboxes not available
I have an environment with an Exchange 2013 (15.00.1497.048) and an Exchange 2019 CU14 server installed. The new 2019 server appears to be fully operational with the exception of the system mailboxes, which means I cannot migrate the mailboxes off the 2013 server. What I have tried to resolve this issue: Re-run /PrepareAD - This did create the AD accounts; however, the system mailboxes were not created and when attempting to enable them getting the following error: "The user's Active Directory account must be logon-disabled for linked, shared, or resource mailbox." Checked for disabled or soft-deleted mailboxes - none that match the GUIDs for the system mailboxes Deleted the system accounts from Active Directory and re-ran /PrepareAD. It ran successfully and created the AD accounts; however, still getting the same error when attempting to enable the mailboxes. Looking for any insight into how to resolve this issue.
554 5.3.4 Content conversion limit(s) exceeded
Could not send mail from PowerBI to local mailbox using SMTP receive connector. There is EventID DELIVERFAIL: "STOREDRV.Deliver.Exception:ConversionFailedException; Failed to process message due to a permanent exception with message The content conversion limit has been exceeded. ConversionFailedException: The content conversion limit has been exceeded. [Stage: PromoteCreateReplay]'" in Transport log. How/where could I check/set the content conversion limit? Is there some other log, where I can find detailed information about this? Message size is 1.3MB, maximum message size in connector is 20MB Exchange 2019 CU 14 Thanks.Two Exchange servers in one domain
Hello everybody, I want ask you, because I can’t find how “Exchange magic” works. I have two seperate Exchange DAG clusters in one domain, with different DNS records and different Virtual Directories URLs. Servers are on two physically diferent locations, but we create a direct connection between two locations for migration mailboxes in near future. We notice sometimes clients from old enviroment can connect through new enviroment and access to mailboxes on old servers. How is it possible? What communication ongoing between old and new Exchange enviroments? Can somebody explain me specifically? Thank you very much for answer to this mystery.
How to repair a corrupted Public Folder (on-prem)
Hello guys, Hope all is well. In our Exchange 2019 environment we use Public Folders extensively. Everything seems ok except one of folders that looks corrupted. I can execute commands Get-PublicFolder / Set-PublicFolder against it, I can get its items statistics (Get-PublicFolderItemStatistics) and have access to items through Outlook. But commands Get-PublicFolderStatistics, Get-PublicFolderClientPermission return the same error: The security principal specified is already on the permission set. + CategoryInfo : NotSpecified: (:) [Get-PublicFolderStatistics], CorruptDataException + FullyQualifiedErrorId : [Server=E7,RequestId=b2f89187-878f-4cab-b05f-fcdaa7d82c0d,TimeStamp=2/17/2025 3:19:42 PM] [FailureCategory=Cmdlet-CorruptDataException] B960021F,Microsoft.Exchange.Manag ement.MapiTasks.GetPublicFolderStatistics I tried to repair the corresponding public folder mailbox (New-MailboxRepairRequest) but none of my requests found errors. I moved the public folder content to a different public folder mailbox, no success. Any ideas how to fix the issue? My guess is that ACL list of the public folder is corrupted. Regards, Dmitry HorushinMDDGs: You'll know exactly to whom the message is being sent
I'm currently reading about modern dynamic distribution groups (https://learn.microsoft.com/en-us/exchange/recipients-in-exchange-online/manage-dynamic-distribution-groups/modern-dynamic-distribution-groups). The documentation states You'll know exactly to whom the message is being sent, I was first positively surprised that users are now finally able to see who an email is being sent to, much alike to regular distribution groups. So I created a MDDG a couple of days ago and now tried to expand it. In the Outlook desktop client, I see an error: And in OWA simply nothing happens after confirming to expand the MDDG. As an administrator I can confirm in the Exchange Admin Portal that this group has members. Does this work for you?
Exchange Server 2019 HA & DR - Design
Hello Team, I'm asked to setup a HA & DR of Exchange Server 2019 (In-House) with only Internal Clients connecting to it. There will be no Internet or external access. There are 2 Sites, A & B connected by Dark Fibre of 10G and though users are around 3000 but their usage is very minimum as it is only for internal purposes. They are keen to have HA & DR and in current setup I had setup HA with 3 servers. I was reading about cross-site DAG and need little assistance in setting up the same. I need to design HA & DR so that if there is a site failure then automatically the DR should continue the work. I thought Active-Active would be best because if anyone of the site fails, say Site A fails, the 40-50% of the users who would have their mailboxes on them would move to Site B. 1. Is it best to setup Active-Active or Active-Passive, benefits, safety, Administrator's Tasks in failover scenario? 2. Is it better to keep even nodes on each side with Witness Server (for Site A - Witness Server will be on B) & Alternate Witness Server ? If anyone has a sample design document with key configuration to keep in mind, if you can share it, please let me know,
Exchange 2019 ECP broken after update
Dear all, We currently have a hybrid setup with a Exchange Server 2019 used only for mgmt purposes, and recently CU12 has been installed, and seemed to be working well immediately after the upgrade was done. After a few days, when I tried to logon to the EAC, it seems to be broken, the layout is gone and clicking on something simply brings me to the login page. I have run the updatecas and updateconfig ps1 files, but that did not resolved the issue. The Exchange powershell is still working which leads me to think it might be something in ISS or a config file somewhere got corrupt perhaps? Has anybody any idea what might the be the cause of this, and how to resolve it? It looks like this currently.CVE-2024-49040: Mitigating a Critical Microsoft Exchange Server Vulnerability
CVE-2024-49040 is a spoofing vulnerability identified in Microsoft Exchange Server versions 2016 and 2019. This flaw allows attackers to forge legitimate sender addresses on incoming emails, potentially making malicious messages appear trustworthy. The vulnerability arises from improper verification of the P2 FROM header during email transport, permitting non-RFC 5322 compliant headers to pass through and be displayed as legitimate by email clients like Microsoft Outlook. Recommended Mitigation Steps To protect your organization from this vulnerability, consider the following steps: Apply Security Patches: Enhance Email Security: Educate Users: Implement Strong Password Policies: Monitor Network Traffic: By taking these steps, organizations can significantly reduce the risk of exploitation and protect their sensitive data. It is essential to stay informed about the latest security threats and to adopt a proactive approach to cybersecurity. These patches are available in WSUS. If the concerned team has not yet synchronized, please proceed with the synchronization and apply the latest patches. Alternatively, you can find these patches on the official Note: These patches are applicable for the following Exchange versions: Microsoft Exchange Server 2016 Cumulative Update 23 Microsoft Exchange Server 2019 Cumulative Update 14 Microsoft Exchange Server 2019 Cumulative Update 13
