Problem:
Windows 10 v1709 does not retain App Associations. Although the config performs '%systemroot%\sysnative\cmd.exe /c Dism.exe /online /Export-DefaultAppAssociations:"%USERPROFILE%\AppAssoc.xml" >> "%temp%\AppAssoc.log"' before ProfileUnity at logoff, no AppAssoc.xml was created and the portability file is empty.
"%temp%\AppAssoc.log" shows error code 0x80004002.
Resolution:
Perform Windows update. This is a known issue in the DISM tool on Windows 10 v1709, and the bug is resolved in KB4103714.
https://support.microsoft.com/en-us/help/4103714/windows-10-update-kb4103714
Product: ProfileUnity-FlexApp
Product Version: 6.7.x