If the Best Practive Analyzer is showing this error, you can disable the 8dot3 Names by running the following commands
The number one stands for one of the following options:
- Enable 8dot3 name creation on all volumes on the system
- Disable 8dot3 name creation on all volumes on the system
- Set 8dot3 name creation on a per volume basis
- Disable 8dot3 name creation on all volumes except the system volume
Source for Best Practices: SMB: Short file name creation should be disabled