Microsoft Exchange and Active Directory Blog
When trying to change the Active Directory password of a user via Outlook Web Access (OWA), the following error message may appear on an Exchange 2016 server: You are not authorized to change your password The following error message may also appear in this context when changing the password: The password you entered does not meet the minimum security requirements For this ... Read more
Exchange 2016 already has a built-in "malware filter". I took the liberty of carrying out a small test. I simply redirected the first 6 emails from a quarantine in which a virus / Trojan had previously been found: Sophos UTM E-Mail Protection dutifully rejected all the virus mails. Was also ... Read more
The meeting of the Exchange User Group OWL (EUGO) will take place on Friday, August 11, 2017. If you want to join us spontaneously, you can register now: Exchange User Group OWL (EUGO) The EUGO has been around for almost a year now and we are now meeting for the fourth time in a relaxed atmosphere. ... Read more
Ingo Gegenwarth has published a very interesting article regarding Exchange on HP Proliant Gen9 servers on his blog "The clueless guy". The article deals with possible performance problems when Exchange is installed directly on HP servers and the default BIOS settings are kept: Exchange performance:HP NUMA BIOS settings So for HP servers and Exchange we recommend ... Read more
As Michel reported on networkguy.de, the HTTP proxy of the UTM has been crashing at irregular intervals since today. A corresponding mail lands in the inbox: Http proxy not running - restarted The problem is due to a faulty pattern update for the UTM which was rolled out by Sophos. In the meantime, a corrected pattern has been published (u2d-appctrl43-9.42). Here is the corresponding ... Read more
The e-mail pickup directory is no longer used very often, but today was another case with a somewhat more special software... The e-mail pickup directory is a normal folder in the file system that is monitored by Exchange for new e-mails, if an e-mail lands in this folder, Exchange will try to deliver the mail. ... Read more
I'm currently working on my private PRTG installation and stumbled across the PRTG IPFIX sensor by chance. IPFIX is a further development of Cisco Netflow and is also used to collect and visualize traffic data within a network. Since the Sophos UTM also supports IPFIX, PRTG can use the IPFIX data ... Read more
Microsoft has released new security updates for Exchange 2010 to Exchange 2016. Specifically, it concerns this security vulnerability: This security update fixes a security vulnerability in Microsoft Exchange Outlook Web Access (OWA). The vulnerability could allow privilege escalation or spoofing attacks in Microsoft Exchange Server if an attacker sends an email with a specially crafted attachment to a vulnerable Exchange ... Read more
In the last article, I had already announced that I would also like to use PRTG to monitor the web server protection of the Sophos UTM. Unfortunately, PRTG only offers generic sensors for the UTM, which makes monitoring a little more difficult. I've made some progress with the Sophos RESTful API, but unfortunately RESTful ... Read more
In this article, I already presented a small script that checks the Exchange HealthCheck URLs. Since I use PRTG for monitoring in my private environment, I used a separate sensor for the HealthCheck URLs. PRTG comes with a whole range of sensors for Exchange Server, but due to the limitation of 100 ... Read more
