In this example the File Share is located on the same server which will later host the Skype for Business Standard Server. But in larger or other setup, where the File Share is located on SAN, DFS or File Cluster, you might experience the same issue.
File Share and Folder Prerequisites:
The share name can either a normal share as well as a administrative share$
Share Permission:EVERYONE: READ
ADMINISTRATORS: FULL CONTROL, CHANGE, READ
Folder (Security Settings):SYSTEM and CREATOR: must be Windows Server defaultInstalling user: FULL CONTROLlocal Server Administrators: FULL CONTROL
Skype for Business Topology Builder:Must be started with: "Run as administrator"
Example and problem description:
This example applies to a Windows Server 2012 R2, where we are installing in Single Domain Forest with an Domain Admin. The Domain Administrator Group was placed in the local Member Server Groups for Administrators.
Next step I personally do is setting the User Access Control UAC to NEVER, meaning switching it off entirely.
Acl: "Accesswrite" permission for "RTCHSUniversialServices" on \\fileshareServer\SkypeShare$
Acl: Committed permission changes for \\fileshareServer\SkypeShare$\WinFabDumpFiles.
ACLError: Access permission error.
Error: Failed to save permissions on \\fileshareServer\SkypeShare$
InvalidFolder: Invalid Share.
Error: Caller does not have required permission to create directory \\fileshareServer\SkypeShare$\WinFabTraceFiles. Verify that your user account has administrative privileges and that you selected "Run as administrator" when your started Windows PowerShell.