Microsoft Exchange and Active Directory Blog
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
This third part of the article series "Simple measures for more security in AD" deals with the passwords of local administrator accounts. In many environments, the local administrator passwords are always the same, but this sometimes opens the door to malware and makes lateral movement possible or at least simplifies it. Different passwords for the ... Read more
An Exchange 2016 DAG recently encountered the problem that the mail.que, i.e. the Exchange queue, had grown to over 60 GB. If the mail.que had continued to grow, the hard disk would inevitably have filled up, in which case the Exchange server in question would no longer have been able to deliver mails. Also on the other Exchange servers within the DAG ... Read more
New Cumulative Updates for Exchange Server 2013, 2016 and 2019 were released today. Click here to go directly to the downloads (the links may not work directly, just try again later): Exchange Server 2019 Cumulative Update 2, VLSC Download Exchange Server 2016 Cumulative Update 13 Exchange Server 2013 Cumulative Update 23 CUs ... Read more
I have already described the basic functionality of Admin Tiers in Part 1 of this article series; this article will now focus on setting up Admin Tiers in an existing environment. Basically, it makes sense if at least one Admin Host has already been installed. By and large, this article is first of all about ... Read more
