Microsoft Exchange and Active Directory Blog
An Exchange 2016 DAG recently encountered the problem that the mail.que, i.e. the Exchange queue, had grown to over 60 GB. If the mail.que had continued to grow, the hard disk would inevitably have filled up, in which case the Exchange server in question would no longer have been able to deliver mails. Also on the other Exchange servers within the DAG ... Read more
New Cumulative Updates for Exchange Server 2013, 2016 and 2019 were released today. Click here to go directly to the downloads (the links may not work directly, just try again later): Exchange Server 2019 Cumulative Update 2, VLSC Download Exchange Server 2016 Cumulative Update 13 Exchange Server 2013 Cumulative Update 23 CUs ... Read more
Microsoft has released a new security update for all currently supported Exchange Server versions. What exactly the problem is with the Exchange Server versions has not been published. The description of the security advisory only states: Microsoft has released an update for Microsoft Exchange Server that provides enhanced security as a defense in depth measure. ... Read more
Microsoft has announced the Exchange 2019 Sizing Calculator. As with Exchange 2016 and earlier versions, this is an Excel file that can be used to calculate the hardware requirements for new Exchange 2019 installations. Unfortunately, the Sizing Calculator cannot be downloaded, but will be delivered together with the upcoming CU2 ... Read more
In January, I already wrote an article about problems with the Outlook connection to Exchange during the migration. In this new article I would now like to mention a few more common causes of problems. DNS server is not a DC During the coexistence of the Exchange servers, it can happen that users cannot transfer mails between the ... Read more
The following e-mail has reached me and if you ask so nicely, I owe you an answer: Dear Frank, I have the following problem: Users in our Exchange organization should not be able to adjust their address book entry themselves. This means editing "Options - General - My account", where they could change e.g. address, telephone number, etc. I have ... Read more
Microsoft has recently released .NET Framework 4.8, which will also be delivered promptly via Windows Update. However, .NET Framework 4.8 should not currently be installed on Exchange Servers. Exchange Server only supports certain .NET Framework versions depending on the update status. .NET Framework versions not supported by Exchange cause trouble from time to time (see here and ... Read more
In part 3 of this article series, I described the configuration of the ELK components. If someone has already built the environment up to this point, there should already be some data records from the Exchange Message Tracking Logs in the Elasticsearch instance. Introduction This article is about the creation of a simple Kibana dashboard, which provides initial data ... Read more
Microsoft has released security updates for Exchange Server today. Specifically, these are the following vulnerabilities: CVE-2019-0817: Microsoft Exchange Spoofing Vulnerability CVE-2019-0858: Microsoft Exchange Spoofing Vulnerability CVE-2019-0817 applies to all currently supported Exchange Server versions (including Exchange 2010). CVE-2019-0858 affects Exchange from version 2013 onwards. Even though the vulnerability is "only" rated as "Important", it ... Read more
Since the last article on Sophos UTM Webserver Protection and Exchange was written a few days ago, I have decided to update the howto. The last article referred to UTM 9.4 and is now almost 3 years old. Therefore there is now a new article with the UTM in ... Read more
