I just tried to backup the Information Store on a local NTFS partition of the server, and it worked. Recovering a single mail was also no problem. Since my last post, I also switched from Evaluation-Version to Licensed, thereafter, the "Advanced Disk-Based Backup Option" disappeared. I reckon it is not included in the license. The problem is: I obviously cannot store the backup on the NAS device without this ADBO.
Is it possible to store the backup of the Information Store on a NAS rather than on a local NTFS partition WITHOUT the Advanced Disk-Based Backup Option? Whenever I try to select the Backup-To-Disk Directory on the NAS as target device for the backup, I get an error message saying that only local NTFS partitions are valid targets for the backup. But this message only appears if I try to backup the Information Store. Backing up the file system is no problem.
So is it a technical problem or a license issue? Before I entered the license key, I had this "Advanced Disk-Based Backup Option" where I was able to select the Checkbox "Backup to different host" or so (in german it is "Sicherung auf einem anderen Host"). Thereafter, no error message appeared, the backup process finished with no errors, but, if I remember correctly, I was not able to select individual mailboxes or even mails to recover (therefore my initial question).