So when doing the restore I failed to found the backup database. Maybe I used a wrong order... I first activated the backup function and the iSCSI volume on the destination system, without the Dynamic Volume connected. Anyway, I could not get the setup for restoring the data.

But after thinking about this topic the last days, I remembered my test machine for Open-E which was still sitting under my desk. Just a cheap office PC, some years old, call it "backup PC" for my office. I still had the USB stick with Open-E on it lying around, I put in a suitable hard drive and started a volume replication from my main DSS to this machine.

Next I shipped this machine to the destination place for WAN setup and there I simply converted the replication target to a source and finally did a Data Replication from the PC over the the destination DSS.

Now, both machine, source and destination have almost the same state. I only needed to setup the Data Replication over WAN and I am done.

Very easy, you just need a spare machine with a suitable hard drive. For Open-E I used a testing license of course.