Microsoft Exchange and Active Directory Blog
Two vulnerabilities in Exchange Server 2016 and Exchange Server 2019 are closed with corresponding security updates. These are the two vulnerabilities: CVE-2019-1233: Microsoft Exchange Denial of Service Vulnerability CVE-2019-1266: Microsoft Exchange Spoofing Vulnerability Both vulnerabilities have an "Important" rating. Details on the vulnerabilities can be found at the links above. Here you can download the ... Read more
On March 17, 2018, I drew attention to an idea by Jeff Guillet. The idea is about saving email signatures as part of the Exchange mailbox so that a uniform signature is possible on all devices. Up to now, the Outlook e-mail signature has been saved in the user profile of the respective client. The idea of ... Read more
Users are often added to the local "Administrators" group on servers or PCs to give users admin rights on the corresponding computers. Although this is the easiest way to configure admin rights for a user account, it is unfortunately easy to lose track. Here is an example of the members of the local administrator group of a server: The users ... Read more
After I released a new version of the Exchange Reporter on June 27, 2019, a few bugs have been fixed in the current version 3.6. Here is an overview of the changes: New functions FTP upload function (thanks to Daniel) Bugfixes Rblreport: Blacklist bl.spamcannibal.org removed, as it no longer exists VmwareReport: PowerCli is now loaded as a module (thanks to ... Read more
Sophos has released a new update for UTM 9.6, which raises the version number to 9.605-1. The following issues have been fixed: [NUTM-10885]: [Basesystem] Fallback log flooded since update to 9.6 [NUTM-10667]: [Email] Emails are not being processed, have "Stale ID in DB" in debug log [NUTM-10870]: [Email] UTM not rejecting emails with dot at the end ... Read more
Here is a short guide on how to establish a Site-2-Site (S2S) VPN connection to Microsoft Azure with the Sophos UTM. Since the Azure portal has been significantly revised in the meantime and I have only found quite old HowTo's, I have summarized my configuration of the UTM and Azure here. If I find some time, I will also ... Read more
Microsoft released new security updates for Exchange Server 2010, 2013, 2016 and 2019 on July 9. The updates address the following vulnerabilities: CVE-2019-1084 | Vulnerability in Microsoft Exchange related to information disclosure CVE-2019-1137 | Vulnerability in Microsoft Exchange Server related to spoofing attacks CVE-2019-1136 | Vulnerability in Microsoft Exchange Server related to privilege escalation All 3 vulnerabilities are ... Read more
Quick tip on a problem that can occur after a deleted mailbox or distribution group has been restored. Users who send mails to the restored mailbox or distribution list receive an NDR with the following error message: STOREDRV.Deliver.Exception:AccountDisabledException.MapiExceptionMailboxDisabled; Failed to process message due to a permanent exception with message The mailbox /o=FrankysWeb/ou=Exchange Administrative ... Read more
I recently added 3 Ubiquiti (UBNT) switches to my private network. After replacing the old switches with the new UBNT switches, these now also had to be integrated into the monitoring. I use the free version of PRTG to monitor my network. For the Unifi access points there is already ... Read more
After a long time, I have once again revised the Exchange Reporter and fixed various bugs. Most of the modules now also work with Exchange 2019. The following fixes and new functions are now included in version 3.4: New functions Support for Server 2016 (AD) and Exchange 2019 Bugfixes Link in the PSPKI documentation corrected ... Read more
