Microsoft Exchange and Active Directory Blog
A reader reported a problem after installing a Cumulative Update (CU) on an Exchange 2016 server. It was no longer possible to access OWA and ECP after the installation. Both applications only returned a server error. When calling OWA, the error message read something like this: The file or assembly "Microsoft.Exchange.Common, Version=15.0.0.0, Culture=neutral, ... Read more
Better late than never: CU 11 for Exchange Server 2016 was released today. Microsoft is a little late this time, as the updates were actually expected back in September. Due to the late release of CU11, there will be no CU in December. CU12 will therefore only be released in March 2019 together with CU1 for Exchange ... Read more
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
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
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
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 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
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
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
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
