Windows file share error

Clients are suddenly unable to connect to a Windows file share on their Quickbooks server (workgroup environment).  See  attachment for errors.

I have cleared saved credentials from Credential Manager on the client and rebooted, still getting this error when trying to connect to the file share.
Craig CummingsAsked:
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Craig CummingsAuthor Commented:
Thanks for all the suggestions.  Sorry to post with so few details and disappear, got caught up in trying to fix it.  It's resolved now.  

This is what I figured out:

Windows Update containing an update for SMB Server installed overnight, server rebooted, followed by a Server Event ID 2504

Security Update that was installed -

Information      2/6/2018 3:10:24 AM      WindowsUpdateClient      43      Windows Update Agent
Installation Started: Windows has started installing the following update: 2018-01 Cumulative Update for Windows 10 Version 1703 for x64-based Systems (KB4056891)

Warning    2/6/2018 8:19:00 AM    Server    2504    None    
The server could not bind to the transport \Device\NetbiosSmb.

It was fixed by using Quickbooks Database Server Manager "Scan Now", which apparently launches a Network Diagnostic tool.  In the output, it said that Windows FW was blocking Quickbooks...attempting to resolve...then eventually Resolution Successful!!!
JohnBusiness Consultant (Owner)Commented:
Open cmd.exe on a machine wanting access.  Type the following:

net use z: \\nameofcomputer\nameoffolder  <enter> and authenticate.

What numerical error do you get?
Travis MartinezSmoke JumperCommented:
Is it possibly an SMB 1 issue?
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Can you even ping the IP nr?
Jose Gabriel Ortega CCEO J0rt3g4 Consulting ServicesCommented:
Craig from your picture they are just trying to connect to the desktop.

The shares should have the structure like John said:

Not just \\<computer>

So you are in a Workgroup environment, the best bet to do this, is to set the username for each people on every computer.

If you have five people, one used by people by computer with the SAME PASSWORD, so you get skipped the prompt.

So Workgroups are like that:
COMP1   | comp2  | COMP3 ...... | computerN
user1     |   user 1   | user1
user2     |   user2    | user2
usern    |  usern   | usern

It's a bunch of work, but well, that's how workgroups work... don't blame it on me.
Jose Gabriel Ortega CCEO J0rt3g4 Consulting ServicesCommented:
Ok just set that as an answer. thanks
Craig CummingsAuthor Commented:
this is the resolution
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