SMB V3 on MS Server 2012 R2 RRS feed

  • Question

  • Dear All, 

    Got a problem with SMBv3, i am using MS Server 2012 R2(Server A) and i want to net use also at MS Server 2012 R2 (Server B)

    but got a problem when i try to start from Server B to Server A using cmd command, got an error 

    An extended error has occurred, and on my event viewer on smb application got and error Event 31013.

    but when i try to change from server A to server B no error can start from cmd command.

    any suggestions about my problem?


    Wednesday, September 9, 2020 8:43 AM

All replies

  • HI 

    Please describe you problem clearly.



    Wednesday, September 9, 2020 5:19 PM
  • Hii sorry if confuse u..
    So here my problem..

    1. I have Server A, with Operating System Windows Server 2012 R2

    2. I have Server B, with Operating System Windows Server 2012 R2..

    I want copy a file from server A to Server B, using file share using open command prompt->"start \\server-A", I got an error like it said "An extended error has occurred". From Server A to Server B I using Network IP address, and both server can communicate accross network

    But when i try from server B to Server A there is no problem.

    Then i try to troubleshoot and search on internet,

    on my server A event viewer there is error on SMBClient event log, it's said like this : 


    The signing validation failed.

    Error:The cryptographic signature is invalid.

    Server name: \\ServerB
    Session ID:0xA8000000004D
    Tree ID:0x1
    Message ID:0x4
    Command: Ioctl

    This error indicates that SMB messages are being modified in transit across the network from the server to the client. This may be due to the session ending on the server, a problem with the network, a problem with a third-party SMB server, or a "man-in-the-middle" compromise attempt.


    It said like that on my event viewer server, and I Search on internet I also found to disable SecureNegotiation still can not..

    try change value EnableSecuritySignature still cannot.

    Any Idea?

    Thursday, September 10, 2020 3:16 AM