Exchange Server: Reinstallation without data loss (e.g. after an attack)

Many admins are currently reporting a successful attack on their Exchange server. Many are finding evidence of unauthorized access or even an installed web shell. Many are now unsure what to do or how to proceed. Some are now implementing IIS rewrite rules or deactivating the UM services, for example, as described in this article by ... Read more

QuickTip: NDR after restoring distribution groups or mailboxes

Quick tip on a problem that can occur after a deleted mailbox or distribution group has been restored. Users who send mails to the restored mailbox or distribution list receive an NDR with the following error message: STOREDRV.Deliver.Exception:AccountDisabledException.MapiExceptionMailboxDisabled; Failed to process message due to a permanent exception with message The mailbox /o=FrankysWeb/ou=Exchange Administrative ... Read more

Exchange 2016: Restoring a database on another server

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

Exchange 2016: Backup and restore with Windows Server Backup (Part 2)

The second article in this series is about restoring a mailbox from the data backup that was created in part 1 with the Windows Server backup. The procedure is the same for many backup tools and essentially consists of writing the mailbox database back to a restore database and restoring the required data from it. The procedure described here ... Read more