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Parallels on iMac with Windows10 - iMac sees all networked PC's - Parallels does not

I have a client.  The owner has a new iMac from which he uses Parallels to run Quickbooks with the data file on a Windows networked PC running Windows 10.  

All shared files on the Windows PC allow "Everybody" total access.  All PC's on the network can see all shared folders on the Windows PC that has the Quickbook Folder "Shared".

On the iMac, bringing up Network shows the entire network, and the shared folders.  

When Parallels is fired up on the iMac, the Windows PC doesn't appear.  As a consequence, he can't access the Quickbooks Company File.

The network connection on the iMac is set to wireless.  I've checked switching to a wired, bridged connection with the same results.  

So, we have a new iMac with Parallels installed so the client can work with Quickbooks 2016 as a client of the "Host" PC where the company file is stored under a Multi-User License.  But, although in the Apple OS, he can see all network PC's, the minute he fires up Parallels - Starts Windows 10 - That host machine isn't seen.
NetworkingWindows 10

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8/22/2022 - Mon

the VM on Parallels should be using "Bridged Networking" directly access the SAME subnet of where the iMac is based. see below for the details.

Which networking mode (Bridged, Shared or Host-Only) should I use for the virtual machine?

as you mentioned, you have probably already done this but you do need to verify the settings by checking if the iMac and the VM  are on the SAME subnet and can PING each other.
Davis McCarn

Try this first and see if it gets better:
Are you signed in to Windows 10 with a Microsoft Account?

If so, you’ll want to switch to a Local Account if you’re using old-fashioned folder sharing instead of a Homegroup. As far as I can tell, this is the only way to fix it.

To switch to a local account:
1.Click Start
2.Type: account
3.Click Change your account picture or profile settings
4.Click the link: Sign in with a local account instead

From this page: http://scottiestech.info/2015/08/01/10-fixes-for-common-problems-in-windows-10/

So, as I understand it, I should go into the Windows 10 virtual machine on the iMac, and sign in as a local account.....?  

BTW, I did notice at the same business, one PC was part of a homegroup, and couldn't be seen until I deleted the homegroup. Not an identical situation, but along the same lines.  Essentially, you can't have it both ways.

It's the weekend, so I'll hit it again on Monday, and let you know if it worked.  Thank you
Your help has saved me hundreds of hours of internet surfing.

> checking if the iMac and the VM  are on the SAME subnet and can PING each other.

before workgroup authentication, the network level verification should be done first. did you do that?

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I went through the suggestions.  That didn't work, so I decided to reinstall Parallel Tools as suggested.  That didn't work either.  Then I installed a clean version of Windows 7 which didn't solve the issue, but after double checking everything I had done, I decided to check the host PC.  That's when I discovered it was set to "Private".  Reading the attached settings information, I just switched it to "Off" since the PC was now "Public".  That solved it.  On Windows 10, you are either Private, Public, or Domain unless you want to work within a Homegroup.