I know that having to go through multiple troubleshooting steps and not having any of them work can be a real pain, especially when you have more important things to be doing, adamabel1. 

I appreciate you for performing some troubleshooting steps to get this resolved. Aside from the steps you've performed, we can uninstall QuickBooks Data Server Manager to refresh the connection. Here's how: 

1. On your keyboard, press the Windows key + R.
2. The Run dialog box opens. Enter appwiz.cpl, then OK.
3. Choose the QuickBooks Database Server Manager.
4. Select Uninstall/Change and follow the onscreen instructions.

Then, rename the installation folders. If you don’t see the Application Data or Program Data folder, you need to display hidden files and folders or search for files using Windows. We can only uninstall or rename the QuickBooks version folder found in the Intuit folder: C:\Program Data\Intuit if you have other Intuit apps installed on your computer. Here's how: 

1. Go to the installation folders. Refer to the chart below.
2. On your keyboard, press the Windows key + R to open the run command.
3. Enter (or copy and paste) the location of the folder, then Enter.
4. Right-click the folder, then choose Rename.
5. Rename the folder to .OLD.

Once done, reinstall QuickBooks Database Server Manager. Here's an article you can refer to for more details about reinstalling Database Server Manager and setting up file sharing. If you already did these steps and still getting the same result, I'd suggest contacting our Technical Support Team to help you with this one. They have all the necessary tools to determine the cause and guide you with a fix. You can check out our support hours to ensure we can assist you on time. Here's how: 

1. Go to the Help menu.
2. Select QuickBooks Desktop Help.
3. Click Contact Us.
4. Enter a brief description of your issue, then click Let's talk.
5. Then choose your preferred way to connect with them.

Feel free to visit our QuickBooks Help Article page for more insight about running your business in your account.

This should point you in the right direction. Keep me posted on how it goes or after reaching out to our support team. I want to make sure this is taken care of. You have a good one.