Microsoft Exchange and Active Directory Blog
The following problem has been around for a very long time: users should use standardized signatures for emails, preferably across all devices and clients. Until now, this has required additional software to create and manage signatures. Exchange Server itself only offers the option of centrally managing signatures for OWA. For Outlook and ... Read more
I have now received several emails with questions about the Exchange backend certificate, so here is a short article about it. In most cases, the backend certificate was deleted during cleanup. The following article deals with the function and necessity of the backend certificate and also how to restore it if it has been accidentally deleted. What ... Read more
Last Monday I published a revised version of the Exchange Certificate Assistant. The last version previously only supported Exchange 2016 on Windows Server 2016. The current version now also supports Windows Server 2012 R2 and Exchange 2013. Also new is the possibility to send the notification mails with authentication on the SMTP server. In addition, ... Read more
I have started to revise the "Exchange Certificate Assistant". The previous version is no longer compatible with the current ACMESharp module and therefore requires an old version of the module. However, since some relevant parts of the ACMESharp module have changed in the meantime, it is time for a new version of the "Exchange Certificate Assistant". I have updated the "Certificate ... Read more
Anyone using Exchange 2016 in conjunction with a wildcard certificate should also configure the receive and send connectors accordingly. This may also be necessary for SAN certificates. If the SAN certificate contains the domain name as the "Common Name (issued for)" and not the corresponding server name of the Exchange server, problems may occur, for example, when encrypting the SMTP connection using STARTTLS. ... Read more
If Outlook cannot download the Offline Address Book (OAB) from an Exchange 2016 server, the following error message is displayed: Error (0x8004010F) while performing the task: Error during operation. An object cannot be found. Unfortunately, this error message is quite general and can be caused by various problems. The cause of the error was in this ... Read more
I have just uploaded an updated version of the "Exchange Autodiscover Whitepaper". Since the behavior of Outlook 2016 in connection with Autodiscover has changed somewhat in November 2017, I have adapted the whitepaper accordingly. Outlook now prefers Autodiscover in conjunction with Office 365, which leads to problems if the user has an Office 365 account. Read more
Microsoft has published an article on Exchange Server and Spectre (speculative execution side-channel). As this is a vulnerability in the processors, Exchange Server is also affected. There are a few things to note. Microsoft writes the following: As these are hardware level attacks targeting x64-based and x86-based processor systems, all supported versions of ... Read more
The Exchange Message Tracking Logs are not only helpful to analyze MailFlow problems, but are also great for generating statistics. My script "Exchange Reporter" uses the message tracking logs to generate some statistics on received/sent mails. The Message Tracking GUI is also based on the Message Tracking Logs. The Exchange Reporter ... Read more
On Exchange 2016 servers, the following event is sometimes written to the application log every 30 minutes Source: MSExchangeDiagnostics Event ID: 1006 The performance counter '\\EXCHANGE\MSExchange Assistants - Per Database(msexchangemailboxassistants-fwdb)\Event Dispatchers Catching Up' sustained a value of '2.730,00', for the '30' minute(s) interval starting at '10.01.2018 19:39:00'. Threshold breached since '25.12.2017 21:09'. None Trigger Name:EventDispatchersCatchupQueueTrigger. Instance:msexchangemailboxassistants-fwdb This ... Read more
