Microsoft Exchange and Active Directory Blog
Microsoft has released new security updates for Exchange Server 2016 and 2019. The update fixes 6 vulnerabilities that are marked as important. In addition, further adjustments are necessary after installing the updates. There are currently no indications that the vulnerabilities are being exploited. Click here to download the updates: The following vulnerabilities are fixed: ... Read more
On July 14, 2023, Microsoft reported a security incident that affected Exchange Online and Outlook.com customers. According to Microsoft, the Chinese hacker group Storm-0558 managed to get their hands on a private SIgnature key for generating access tokens for Exchange Online and Outlook.com. With the private key, the hackers were able to generate access tokens for ... Read more
On an Exchange 2019 server, I noticed inherited permissions that were deliberately not set in this way. I suspect that these are standard permissions that are set when Exchange servers are installed. In this case, an account that was used for installation has quite extensive permissions at mailbox and database level. I noticed ... Read more
A reader, who wishes to remain anonymous, has kindly sent me his scripts and configuration for Let's Encrypt, HAProxy and Exchange 2019 in conjunction with Extended Protection so that I can publish them here. First of all, I would like to thank you very much, because I think this configuration (HAProxy as a reverse proxy for Exchange, certificates via Let's ... Read more
Nobert has informed me that Microsoft has updated the prerequisites for the installation of Exchange Server 2019 and 2016. The Windows feature Message Queuing (MSMQ) is no longer required and can be uninstalled from the Exchange servers. The two Windows features "Message Queuing (MSMQ) Activation" and "Message Queuing" are removed with the automatic installation of the ... Read more
Microsoft has released new security updates for Exchange Server 2016 and 2019. The update fixes two remote code execution vulnerabilities with a severity rating of "Important". Click here to download the updates: The vulnerabilities are not yet being actively exploited. However, the available updates should be installed as soon as possible. Click here for the article on the ... Read more
The following error often occurs after migrating an Exchange server. Outlook cannot download the offline address book with cache mode switched on and displays the following error message: "Error (0x8004010F) while executing the task: Error during operation. An object cannot be found." The error can occur if the address book was migrated to an offline ... Read more
OpenAI AI is currently on everyone's lips and every day there are new articles in the media about GPT3 or GPT-4 with tests of how well or badly something works. There are calls for the regulation of AI systems and some people are already predicting mass unemployment. Whether all this ... Read more
CU13 for Exchange Server 2019 was released yesterday. The CU13 contains all previous security updates and brings new features for Exchange Server 2019. The CU13 can be downloaded here: CU13 finally brings Modern Authentication (OAuth 2.0) for on-prem Exchange Server. Until now, Modern Authentication was only available in conjunction with the hybrid configuration, i.e. ... Read more
During an Exchange 2016 to Exchange 2019 migration, no mailboxes could be moved to the new Exchange 2019 databases. The MoveRequests got stuck at 0% and showed the error StalledDueToSource_DiskLatency: No matter how big or small the mailbox was: No mailbox could be moved. Directly after creating the MoveRequest, the error StalledDueToSource_DiskLatency was displayed. Also ... Read more
