Microsoft Exchange and Active Directory Blog
Introduction This article contains my favorites for general adjustments to the Exchange environment after or during installation. The hardening measures described below are very general, so they can be applied to existing and new environments. The measures relate to the Exchange server and the operating system itself, whether the measures are ... Read more
The .NET Framework 4.7 has been available for about a month and is expected to be distributed soon via Windows Update. Even though .NET 4.7 is already supported on Windows Server, you should be careful with Exchange Servers. Here is the current support matrix for Windows Server and .NET 4.7: The .NET Framework 4.7 is supported on the following Windows Server ... Read more
After the "Exchange 2016 Autodiscover Whitepaper" was very well received and has over 6000 downloads, there was a small vote from April to May on a new topic for the next whitepaper. A total of 637 people took part in the vote, with the topic "Exchange and certificates" receiving the most votes. Here is the final ... Read more
I have just uploaded the new version of the Message Tracking GUI and fixed two issues that have been bothering many users. The following issues have been fixed: On small screen resolutions, the window is now resizable and shows scrollbars when needed The recipients are now correctly entered into the CVS file The current version can be downloaded here ... Read more
In the comments to the article "Exchange 2016: Install Cumulative Updates (CU)" it was pointed out to me that with Veeam Backup & Replication 9.5 U1 and Exchange 2016 CU5 there are problems with the single item restore. The databases can be backed up and restored normally, but the Veeam Explorer for Exchange no longer works with Exchange 2016 ... Read more
During the migration from Exchange 2013 to Exchange 2016, the following error (version mismatch) may occur when moving user mailboxes from Exchange 2013 to Exchange 2016: A version mismatch was detected (Actual:6, Expected:5) The following message can then be seen in the Exchange 2013 server log: 2017-04-23T20:37:21.432Z,6,Default,Error,",", "RegisterMigrationBatch failed, exception at Microsoft.Exchange.Migration.MigrationServiceHelper.SafeInvokeImplMethod(Action method, MigrationServiceRpcMethodCode methodCode) at Microsoft.Exchange.Migration.MigrationNotificationRpcSkeleton.RegisterMigrationBatch(IMigrationNotification ... Read more
In article 2, I had already written my opinion on RPCoverHTTP (Outlook Anywhere) in conjunction with Sophos XG and two public DNS names. Here again briefly to repeat: The background is that most of the protection mechanisms of the web server protection for Outlook Anywhere must be switched off. This then also applies to the remaining web services such as OWA ... Read more
In January, I published the first public version of the Exchange Autodiscover Whitepaper. So far the PDF has more than 5000 downloads, now there is an updated version. The PDF now comprises 64 pages on Exchange Autodiscover, including sample configurations (6 pages more). A revision was necessary, as I had previously only dealt with the topic of split DNS in conjunction with Autodiscover ... Read more
OPNSense is a fork of the well-known open source firewall PFSense, I personally like OPNSense better, the GUI is tidier, there is a REST api and the most important plug-ins are also available. As there is a plugin for HAProxy and also for Let's Encrypt for OPNSense, I have started testing this combination in conjunction with Exchange 2016. OPNSense ... Read more
The Chrome browser reports the following error for websites running on an IIS server on Windows Server 2016: ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY In this case, Chrome does not allow the error to be ignored. The problem also occurs with Exchange 2016 servers installed on Windows Server 2016. The problem lies in old cipher suites and ... Read more
