Only the first user can connect to a network-attached storage device when you use SMB 2.0 in Windows 8 or Windows Server 2012

Se aplica a: Windows 8Windows 8 EnterpriseWindows 8 Pro


On a computer that is running Windows 8 or Windows Server 2012, you use the Server Message Block (SMB) 2.0 protocol to connect to a share on a network-attached storage device. As the first user to connect to the storage device, you connect successfully. However, when other users try to connect to the storage device, their connections fail.

Note This problem does not occur if you use SMB 1.0 to connect to the storage device.


This problem may occur when the network-attached storage device does not integrate correctly with SMB 2.x or SMB 3.0.


Hotfix information

A supported hotfix is available from Microsoft Support. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, go to the following Microsoft website: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


To apply this hotfix, you must be running one of the following operating systems:

  • Windows 8
  • Windows Server 2012

Restart requirement

You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any previously released hotfix.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


Learn about the terminology that Microsoft uses to describe software updates.