Making inactive customers active again.

Hi there, Frustrated56.

Thank you for the detailed information you've provided about your concern in making your customers active again, it gives me a helpful overview of the issue. I also appreciate you trying to speak with support to fix the problem and performing some troubleshooting steps. 

If the customer happens to be a sub-customer of the parent customer in which the parent is inactive. You'll have to make the parent customer active again to be able to have the sub-customer active again also. 

If the customer is not a sub-customer, let's try some other troubleshooting that could help fix the problem. This time, let's run the  Verify Rebuild Data tool that helps identify and repairs data issues within your company file. Here's what you'll need to do:

1. Click the File menu at the top.
2. Go to Utilities, then choose Verify Data.
3. If QuickBooks detected no problems, there's no further action needed. If you receive a message, "Your data has lost integrity", the file is damaged. Just continue to Rebuild Data to correct the problem.
4. When you Rebuild Data, you'll receive a message to back up your company file, just click OK. The utility starts as soon as the back up is finished.
5. Click OK when you get the message "Rebuild has completed".
6. Run Verify Data again to check for remaining data damage.

For more details about the Verify/Rebuild process, check this article: Verify and Rebuild Data in QuickBooks Desktop.

Once done, check to see if everything is working now. 

Please let me know how things go on your end. I want to ensure this gets resolve for you. Take care.