Microsoft Exchange and Active Directory Blog
Recently, I have been confronted with problems and opinions on the subject of backup and Exchange Server. This is certainly a topic that can be argued about, so I have collected a few statements on the subject of backup: We don't need a backup, we use a DAG We don't need a backup, we have ... Read more
I am not entirely sure whether the following problem also occurs in environments in which standard Windows DNS servers are used. Companies that do not run their DNS infrastructure on Microsoft DNS servers might be interested in the following article. The following behavior of Windows 10 computers could be reproduced on a "non Windows DNS" server: ... Read more
As Microsoft has recently made frequent changes to the semi-annual feature updates (function updates), it is not easy to keep track of everything. I would therefore like to clarify a few points in this article: 1. explanation of terms/general information Microsoft has renamed the update channels. Previously there was "Current Branch (CB)" and "Current Branch for Business (CBB)". This became ... Read more
I have already described the problem in another article: Users receive an undeliverability report (NDR) when trying to send to mailboxes or distribution lists. The field code in the NDR is "550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found'. Here is an example of such an NDR: The problem occurs, for example, when a distribution list is migrated to a shared mailbox ... Read more
In the previous article, I had already shown how to create new virtual directories for OWA, for example. However, the Exchange Management Shell was always used to recreate them. But what happens if the Exchange Management Shell no longer starts? If the virtual directories have to be recreated and the Exchange Management Shell no longer starts, what ... Read more
Sophos has today released another update for Sophos UTM to fix the WAP2 vulnerability (KRACK): [NUTM-8984]: [RED] WPA2 KRACK vulnerability fixes for RED15w [NUTM-8789]: [Wireless] WPA2 KRACK vulnerability fixes The update has the version number 9.505-4 and can be downloaded and installed directly from the following link: u2d-sys-9.504001-505004.tgz.gpg Since there have been ... Read more
Sophos has released an update for the Shophos UTM. The update fixes the following issues: [NUTM-8851]: [Basesystem] System doesn't boot if Posgtresql database cannot start [NUTM-7240]: [RED] RED 50 loosing ARP entries of internal machines [NUTM-8782]: [RED] RED10, RED15, RED50: Update OpenSSL and TCPdump to most current Version [NUTM-8858]: [RED] DNSMasq vulnerabilities If the update ... Read more
Although the virtual directories for the various Exchange web services can be recreated via the "Exchange Admin Center", there are cases where this function reaches its limits. I have simulated such an error for this article. Even after resetting the directory for OWA with the Exchange Admin Center, OWA does not work: Not everything ... Read more
Exchange 2016 databases can also be restored from a backup to other Exchange 2016 servers. The database therefore does not necessarily have to be restored to the server on which it was backed up or was active. It does not matter whether the server was a member of a DAG. However, it is important that both Exchange servers have the same version of the ... Read more
The following behavior is currently occurring more frequently with Outlook 2016 and Exchange Server 2016 CU7. Outlook asks for the login information after opening attachments or the password prompt appears. I was able to reproduce this behavior in my environment with Outlook 2016 (Version 1708 Build 8431.2079) and Exchange 2016 CU7. As soon as the attachment of an email in ... Read more
