55016: Acronis Files Advanced: Connection from a mobile client fails with "Invalid Signature (2148073478)"

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Symptoms

A mobile client is unable to connect to a share. Connections fails with an error like:

Error enumerating folder 'Operations iPad Share' from server 'Files Advanced File Server': Invalid Signature. (2148073478)

Cause

Windows Server 2012 SMB 3 Secure Negotiation may not allow connections to remote share.

Solution

Disable Secure Negotiate in the Windows Server OS on the Files Advanced server.

  1. Open Windows registry: Start -> Run -> regedit.exe
  2. Navigate to HKLM:\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters\
  3. Set RequireSecureNegotiate to 0.
  4. Reboot