Error copying profile (0x00000001): Incorrect function.

We are using Sophos, but I believe the issue is that when the registry file is created the file is not written/closed when it tries to back it up and copy it. The reason I believe this is because when you run it the second time, it backs up the one that did get written (you can remove some entries in order to change the file and this is the one that gets backed up), then a new file like the original is written. So the logic at this stage needs reviewing. I could spend more time running some tools to confirm this, but really after giving Microsoft this much information you should be able to go and fix it. We believe in the community and would very much appreciate you looking into this issue and ideally fixing it and rolling out an update 5 version of FS Logix. What we are having to do right now is perform the migration with version 2, then upgrade to version 4 post migration. Thanks to Gonzalo Reyna for looking further into this and to Guido Racamato for providing further information. Best wishes to everyone 🙂