Microsoft Exchange and Active Directory Blog
APIPA addresses (169.254.x.x) in the mail header are somewhat unsightly, this problem occurs in an Exchange DAG and can certainly lead to a problem with one or other SPAM filter. Here is part of a mail header: The cause is an incorrect sequence of network connections. The APIPA address belongs to the "Microsoft Failover Cluster Virtual Adapter", which ... Read more
Many of the emails I receive are always about certificates. I have therefore created a small wizard using PowerShell that takes some of the work out of dealing with certificates. It automatically searches for the corresponding DNS names, requests the certificate from a Windows CA and installs it on all Exchange 2013 servers. Without any manual work ... Read more
The faulty Update Rollup 8 for Exchange 2010 SP3 has been re-released in a corrected version. I was no longer able to reproduce the errors in my test environment. However, if you want to be on the safe side, it is better to wait a few more days. Click here to download: http://www.microsoft.com/de-DE/download/details.aspx?id=45225 Here is a list of the corrected problems: http://support2.microsoft.com/kb/2986475/en-us
The update rollup 8 (KB2986475) for Exchange Server 2010 SP3 released yesterday seems to cause problems for Outlook. There are more and more reports that calendar entries can no longer be saved, or that access to Sent Items and Inbox no longer works. OWA does not seem to be affected. If you have already installed the update and notice problems, ... Read more
I didn't really warm to the Sophos UTM 9.2 WAF in conjunction with Exchange 2013. In my opinion, there were too many things that didn't work as I expected. But Sophos UTM 9.3 is now available, so it's time for a new test. The environment is almost unchanged: It ... Read more
Today there are new updates for Exchange Server 2007, Exchange Server 2010 and Exchange Server 2013: Cumulative Update 7 for Exchange Server 2013 (KB2986485) UM language packs for Exchange Server 2013 CU7 Updaterollup 8 for Exchange Server 2010, Service Pack 3 (KB2986475) Updaterollup 15 for Exchange Server 2007 Service Pack 3 (KB2996150) So far there are still ... Read more
Currently there seems to be a bug in the Sophos UTM that prevents a TLS connection from being established. The log file of the sender's MTA then contains entries with the message "TLS handshake failed". Here is an example from Clearswift: There is also a message about this in the Sophos forum: https://www.astaro.org/local-language-forums/german-forum/54875-bug-9-210-20-smtp-send-receive.html Apparently ... Read more
The positive feedback on Exchange Monitor 1.0 has encouraged me to develop Exchange Monitor further. I realized that the previous design is not very good for a small monitoring tool. I therefore decided to change the design and the concept for the data. Here are the most important new features: ... Read more
The videos from the Microsoft Technical Summit 2014 in Berlin are available on Channel 9. A total of 46 videos on various topics are available there: .NET Compiler Framework "Roslyn" ASP.Net vNext closing keynote Alive and kicking: .NET vNext at a glance Authentication and single sign-on for mobile, web and desktop applications Automation 2.0 - data center automation in the public (Azure ... Read more
I have already received several inquiries about back pressure. When Exchange is under back pressure, mails are received or sent slowly or not at all. Often the following situation is described: Exchange is no longer sending or receiving mails and the event 15004 is logged, ... Read more
