Microsoft Exchange and Active Directory Blog
Yesterday, Microsoft released a new security update for Exchange Server 2013, 2016 and 2019. The update closes the vulnerability CVE-2020-16969. The vulnerability can be exploited with a specially crafted email, so the update should be installed promptly. The update is classified as "Important". Microsoft describes the vulnerability as follows: An information disclosure vulnerability exists in ... Read more
A long time ago I updated the Exchange Certificate Assistant for the last time. The script uses POSH-ACME as a client to automatically request Let's Encrypt certificates, but there are problems with the script from time to time. However, since there is now a much better version that also supports Exchange Server (and other services), I will ... Read more
The annual Microsoft Ignite conference will take place online this year. Participation is even free of charge this year, interested parties can register for free at the following link and take part in the online conference between 22.09 and 24.09.2020: https://myignite.microsoft.com/home In addition to many other interesting presentations, there will also be a few sessions on Exchange Server. ... Read more
Microsoft has released new Cumulative Updates (CU) for Exchange 2016 and Exchange 2019 today: Exchange Server 2019 Cumulative Update 7 (KB4571787), VLSC Download Exchange Server 2016 Cumulative Update 18 (KB4571788), Download, The Exchange 2019 CU 7 is also already available for download via MyVisualStudio. Here is a list of the fixed issues: 4570248 "Get-CASMailbox" uses a ... Read more
Microsoft has released a security update for Exchange Server 2019 and Exchange 2016 to close a vulnerability classified as "critical". Specifically, it concerns the vulnerability CVE-2020-16875: A remote code execution vulnerability exists in Microsoft Exchange server due to improper validation of cmdlet arguments. An attacker who successfully exploited the vulnerability could run arbitrary code ... Read more
Once an Exchange 2019 server has been configured, an SSL certificate needs to be installed. To configure the certificate correctly, the hostnames that are relevant for the certificate must be determined. The following script reads the hostnames from the configured URLs of the virtual directories and displays the corresponding hostnames in the Exchange Management Shell ... Read more
During an Exchange migration, the "old" Exchange server may not be able to deliver mails to the new Exchange server. This happened during an Exchange 2013 to Exchange 2019 migration. Mails on the Exchange 2013 server to mailboxes that had already been migrated to Exchange 2019 could not be delivered. The ... Read more
I have received a request from a customer that he would like to have his meeting rooms sorted or displayed by location. How can I implement this requirement? I implemented it with address lists and a custom attribute. The first step is to create the address lists by location, as shown here in the example Bielefeld, Düsseldorf, Frankfurt, Hamburg, Munich and ... Read more
A reader of my blog asked the following question, which I would like to answer briefly here: Hello Frank, I have a question if it can be solved with a script.(Exchange 2016)If employees have their out-of-office assistant active, ActivSync is automatically deactivated as soon as the out-of-office assistant is switched off again, ActiveSync is automatically activated. The whole thing is intended as work protection ... Read more
I haven't needed it for ages, but now I'm back in a situation where I need a POP connector for Exchange. The reason for this is a somewhat idiosyncratic configuration of my new hoster's mail server. Until the problem is solved, I have to pick up exactly one mailbox via POP3 and send it to the local ... Read more
