Microsoft Exchange and Active Directory Blog
It's been a while since the last article on Kemp and Exchange, so here's an updated version. For this test, I used a Kemp Loadmaster VLM-5000 (which is available for free with people with MCP ID for the HomeLab) and Exchange 2019. The Loadmaster firmware used is 7.2.48. The Loadmaster ... Read more
Microsoft has released a new security update for Exchange Server 2013 to 2019 (CVE-2019-1373). The update closes a vulnerability that, in the worst-case scenario, could allow code to be executed remotely. Microsoft classifies the severity of the vulnerability as critical. The update should therefore be installed as soon as possible. Microsoft provides the following details on ... Read more
Microsoft Ignite 2019 started today in Orlando. There aren't quite as many exciting Exchange-related topics at the Microsoft conference this time. Exchange 2019 was already announced last year, but this year there is no new Exchange version, so Exchange is probably only a topic in a few sessions this year. Perhaps ... Read more
Small warning regarding Apple devices and iOS 13. Apparently an old bug from iOS 6 times has returned and is causing trouble again in iOS 13. I warned about the problem "back then" here: Exchange 2007/2010: ActiveSync and iOS 6 bug With Apple iOS 13, too, there are more and more reports that there are ... Read more
Some time ago I had already pointed out the following error, here in connection with Exchange 2013: Exchange 2013: 451 4.7.0 Temporary server error. Please try again later. PRX2 If emails cannot be delivered and Exchange displays the error "451 4.7.0 Temporary server error. Please try again later. PRX2" in the queues, it is possible that ... Read more
During the installation of CU14 for Exchange Server 2016, I encountered the following error. The required schema update could not be performed either from the setup GUI or via shell. The setup aborts directly at "Step 1 of 18: Preparing the organization" with the following error: Here again the error message as text: 1 ... 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
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
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
