Thanks for the rrply. We have a mixed environment witj Windows 7/10 Clients. Now we like to migrate our Fileserver W2K8 R2 to W2k16 . When we copied the filestructure 1:1 to a Winows216 Server: The Windows 10 Clients see and access Filepaths deeper 256 chars but not create/modify files in that path. Window 7 can't see files deeper 256 chars. With the old fileserver 2k8R2 we had not this Problem. Why? What has changed ? What is the recommended procedure to migrate a fileserver ! could someone help? Thanks in advance.