How to Fix Error 0x80070544 The validation information class requested was invalid

Most windows users encounter an issue where when they try and do a backup to a network drive they are prompted with the error “The validation information class requested was invalid. 0x80070544”. The most common cause of this error is the network credentials which it cannot authenticate even though, you’re entering the correct username and password with the right set of permissions.

The issue arises from the formatting Windows has specified in order to allow access which requires the user to prefix the username with that of the remote server or device for example: \\server name\username instead of just the username.

Powershell Method

If the above did not work for you then you can try and run Powershell and execute the following command to initiate the back up.

wbadmin start backup -backuptarget:\\remoteserver\foldername -user:remoteserver\username -password:yourpassword -include:C: -allCritical -quiet

NOTE: If the Backup Drive is connected via USB to the Router then the servername is the router name, and how Windows sees it. For example: on tplink routers, the server name is

Linux or SMB Server or a NAS Device

Since all devices vary, another work around to get this sorted out on a NAS or SMB Server is to add the following parameter to the SMB.conf file.

strict allocate = yes

You will have to Google how to edit the smb.conf file. Generally the path to smb.conf on a Linux Machine is etc/samba/smb.conf and you will need to have root access to edit it.

Kevin Arrows
Kevin is a dynamic and self-motivated information technology professional, with a Thorough knowledge of all facets pertaining to network infrastructure design, implementation and administration. Superior record of delivering simultaneous large-scale mission critical projects on time and under budget.

Expert Tip

How to Fix Error 0x80070544 The validation information class requested was invalid

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