Microsoft Exchange and Active Directory Blog
Sophos has released the update for the UTM to version 9.703 in a bug-fixed version. The update initially caused various serious problems and was withdrawn by Sophos. The update is now available with the version number 9.703-3. This update is intended to fix the following problems: [NUTM-9381]: [Access & Identity] WebAdmin user getting an error while ... Read more
A reader recently told me about a problem with the Sophos UTM web application firewall. Due to the Corona crisis, many of the employees have moved to the home office and have since been using more connections to the Exchange server, which are protected by the WAF of the Sophos UTM. So after there was a higher load on the UTM during the day ... Read more
On several Windows 2019 servers, I have already had the problem that the PowerShell module "Posh-SSH" only returns an error message when establishing an SSH connection. I had this problem with Windows Server 2019 and the Posh-SSH module in version 2.2. Here is a quick tip on how to fix the problem. The error message is as follows: ... Read more
Who isn't familiar with the evil "Reply all" function in Outlook? An important piece of information is quickly sent to the whole company, and then there's a flood of replies because the recipients use the "reply all" function: Depending on the size of the organization, such a flood of emails can generate a few million emails and thus ... Read more
As already announced here, this is the first article on the topic of Exchange Server Monitoring. This article is about the PRTG software from Paessler. PRTG has been on the market for quite a long time and I would classify it as a "classic" monitoring tool. PRTG is therefore well suited for monitoring hardware, ... Read more
A long time ago I had created a small script (Exchange Monitor) which allows a very rudimentary monitoring of Exchange servers. However, the script no longer works with the current Exchange Server versions. I had actually planned to revise the script or I had already experimented with a revised version. Unfortunately, the first ... Read more
Microsoft has released new CUs for Exchange Server 2019 and Exchange Server 2016 today. The CU 5 for Exchange 2019 fixes problems with the search in Outlook when Outlook is operated without cache mode, so the update has probably already been eagerly awaited by some. The CU5 for Exchange 2019 is available as usual ... Read more
Microsoft released a new security update for Exchange Server 2016 and 2019 yesterday. The update closes a vulnerability classified as "Important". Description of the vulnerability: A cross-site scripting (XSS) vulnerability exists when Microsoft Exchange Server does not properly sanitize a specially crafted web request to an affected Exchange server. An authenticated attacker could exploit the vulnerability by ... Read more
In the third part of the article series "Simple measures for more security in AD", I dealt with LAPS for servers and clients. Admittedly: The LAPS article was written some time ago, but the topic has not been forgotten. That's why there is now a new article on "Simple measures for more security in AD". In this fourth part ... Read more
On February 13, 2020, Microsoft released updates for all Exchange Server versions for the vulnerability CVE-2020-0688. If you have not already done so, you should install the update as soon as possible, as it is now known how the vulnerability can be exploited. Although an attacker must first authenticate themselves on the Exchange Server, it is then possible to take control of the ... Read more
