The QuickBooks automatic updates greyed-out issue occurs when you try to manage or disable the app’s update settings, but find the option unavailable. While automatic updates help keep QB up to date, there may be times when you prefer to disable this feature. However, when you try to do so, you may notice that the automatic update option is greyed out and cannot be changed.
https://sites.google.com/view/qbdata/quickbooks-blogs/quickbooks-desktop-error/QuickBooks-Automatic-Update-Greyed-Out