Hello modemers,

Thank you for reaching out to the Community. It would be my pleasure to help you get to the bottom of this strange behavior when changing the company name in QuickBooks Desktop.

First, please make sure to create a backup copy of the company file you want to change the name. This process will help protect the company information from data loss specific to the attachments.

Here's how:

1. Click the File tab at the top menu bar.
2. Select Back Up Company.
3. Click Create Local Backup.

For the detailed steps on creating local backups, you can visit this article I recommend:

Create backup of the QuickBooks Desktop company file.

Once done, the next step you can do is change the name of the company file directly from the saved file location. You can follow these steps:

1. Log in to your QuickBooks account.
2. Press the F2 key on your keyboard to verify the file location.
3. Go to the location specified.
4. Right-click to change the name of the company file.
5. Select Yes to confirm.

Lastly, we'll need to set up your QuickBooks Desktop to use the new company file name and make sure attachments will sync.

1. Open QuickBooks Desktop.
2. Choose Open or restore an existing company.
3. Select Open a company file.
4. Click Next.
5. Go to the company file location (the location showing when you press F2).
6. Click Open.

For your visual reference, I'm adding some screenshots below:

After following the detailed steps above, please open the company file and check if the attachments still exist. You can also change the company name through the My Company section within QuickBooks if needed.

Please know I'm always available here to help you succeed with renaming the company name in the QuickBooks program. I'll keep an eye out on your response.