- ONTAP 9
- Volumes with security style NTFS
- User mapping Unix to Windows user for NFS users has been configured
Connection timeout with the DC will cause the filer to map a UNIX user to the default Windows user of the NFS server as a fallback procedure
It is expected behavior. Always if that happens you need to check the DC connection for temporary failures.
If you are not sure if you are experiencing this issue, please contact NetApp Technical Support and reference this article for further analysis and assistance.