Microsoft Exchange and Active Directory Blog
When creating new databases in an Exchange 2016 organization, I encountered the following problem. The databases could be created within EAC and Shell without any problems. However, after the databases were created, they could not be mounted and remained in the status "unmounted". Unfortunately, at first glance the error message in EAC ... Read more
DMARC is based on the SPF (Sender Policy Framework) and DKIM (Domainkeys Identified Mail) technologies. DMARC can be used to determine how a recipient should deal with a mail that does not correspond to the sender's DKIM or SPF settings. In addition, the recipient can send reports to the sender for evaluation. In this way it is possible ... Read more
MTA-STS (Mail Transfer Agent-Strict Transport Security, STS for short) is a fairly new tool for making sending and receiving mail more secure. MTA-STS has now been adopted as RFC-8461 and can therefore be used. Similar to DANE, information is stored in the DNS for STS. The big difference, however, is that STS does not require DNSSEC ... Read more
The year 2018 felt like it flew by, at least for me, so I would like to wish all visitors, readers, supporters and friends a happy and, above all, healthy new year. It's almost a tradition for me to publish a short review here. FrankysWeb has been around for over 8 years now. The number of visitors ... Read more
I wish all my friends, readers and supporters a merry and above all peaceful Christmas. I hope you can enjoy the holidays with your loved ones and take a break from the stress of everyday life. To all admins who remain on standby during the Christmas holidays or even fight directly for the well-being of the systems, don't let the holidays be spoiled, it has to be ... Read more
As we all know, Exchange 2019 places considerable demands on the hardware, so it can be difficult if a test environment is needed. If the test environment is also to contain several Exchange servers, hardware can quickly become scarce. Especially for test or dev environments, however, it is usually not worthwhile ... Read more
Microsoft has published details of the preferred architecture for Exchange 2019. This is a whole series of best practices for an Exchange 2019 environment. The article can be found here: Exchange 2019 preferred architecture Here is a short summary of the most important points and a few small comments on my part. Namespaces The best practice provides for 4 ... Read more
Microsoft has released a security update for Exchange 2016 CU 10 and CU 11. The update fixes a tampering vulnerability that has been rated as "Important": A tampering vulnerability exists when Microsoft Exchange Server fails to properly handle profile data. An attacker who successfully exploited this vulnerability could modify a targeted user's profile data. To exploit the ... Read more
One of the new Exchange 2019 features are the "Client Access Rules". Client Access Rules can be used to restrict access to Exchange Server based on certain criteria. One use case would be, for example, to allow access to the EAC only from a management network. Unfortunately, the Client Access Rules in the Exchange 2019 ... Read more
I have divided the migration from Exchange 2016 to Exchange 2019 into four articles. To make the articles easier to find, here are the links in the appropriate order: HowTo: Migration from Exchange 2016 to Exchange 2019 (Part 1) HowTo: Migration from Exchange 2016 to Exchange 2019 (Part 2) HowTo: Migration from Exchange 2016 to ... Read more
