Exchange Server: Update KB2565063 must be installed (again)

Important information for Exchange administrators: KB2565063 must be reinstalled on all Exchange Server versions released before October 2018. This currently affects all available Exchange versions and CUs. The background is that the installation files (new installation and update installation) of Exchange have an unpatched version installed and Exchange is therefore still vulnerable to a remote code ... Read more

Exchange Server: Changeover from POP retrieval to MX record

I am still receiving mails about the changeover from POP3 retrieval to direct receipt of mails via MX record in connection with various Exchange versions. I actually thought that retrieving mails from a provider via POP3 and delivering them to local Exchange servers was a thing of the past, but this seems to be happening even more frequently. Read more

KB4457127 causes problems on DCs in connection with Exchange

The September update KB445127 for Windows Server 2016 from 20.09.2018 causes problems on domain controllers in connection with the Exchange GAL (Global Address List). After the update was installed on Windows Server 2016 Domain Controllers, Outlook clients can no longer access the Global Address List: I was also able to reproduce this problem as soon as more than 18 recipients ... Read more

Exchange: Send an overview of a calendar by e-mail

A reader of my site asked me if there is a way to receive an overview of a calendar by e-mail. The background was that a vacation calendar was maintained within the department, which was an Exchange resource mailbox in which each team member entered their vacation. The requirement was now an overview of this calendar for ... Read more

Exchange 2019: Test migration from Exchange 2016 to the Technical Preview

Exchange 2019 is currently only available as a Technical Preview, so I cannot publish detailed instructions on how to migrate from Exchange 2016 to Exchange 2019 at this point. Nevertheless, I was interested to know whether migration is already possible. At the moment, of course, this is only recommended for testing in test environments, as the Technical Preview ... Read more

Exchange Server does not send OOF mails after migration

A reader pointed out a problem where an Exchange server was no longer sending OOF mails (out-of-office messages) after a migration. Kindly, the solution to the problem was also sent along, hence this short article. I think the problem should not occur too often and the error can no longer be fully reconstructed, ... Read more

Exchange leaves mails in the poison queue after email header modification

This article is a guest post by Sebastian Danisch. Many thanks to Sebastian for this article and the solution. Guest article by Sebastian Danisch A colleague of mine recently came up with the glorious idea of using Sophos UTM to modify the email header so that it removes the content ID from the header. His ... Read more

Problems with July Windows Updates and Exchange Server

There are currently problems with Exchange Server and the July updates for Windows Server. Microsoft has now withdrawn the faulty update and provided an updated version via Windows Update. The current update is KB4345418, Exchange Server should be updated as soon as possible to avoid problems with the MSExchangeTransport service. Here you can find ... Read more

Exchange Server 2016: Documentation available at new URL

Just a little information on the side, the Exchange Server documentation has moved from Technet to Microsoft Docs. The documentation can now be found under the following link: https://docs.microsoft.com/de-de/exchange/ The old URLs are still available, so there is no immediate need to update your favorites. The documentation and information on Exchange 2010 and Exchange 2013 can still be found ... Read more

Exchange 2016: Enable audit logging for mailboxes

Monitoring logging can be used to log certain actions for mailboxes. This function is particularly useful for mailboxes to which several users have access. For example, it is possible to track which user has replied to a specific mail or who has deleted which mail. Audit logging can also be helpful for normal user mailboxes. ... Read more