Can you bulk change all sub accounts emails at once?

Thanks for reaching out to us, jeffery-n.

The option to change all sub emails is unavailable in QuickBooks Online. 

You may edit the email one at a time. While the option is unavailable, I suggest sending feedback about the feature you wish to have with QuickBooks Online (QBO).

This way, our Product Developer team can review it. There are always open for opinions as this helps improve our product to suit your business needs. To send feedback, you can follow these steps:

1. Go to the Gear icon.
2. Select Feedback.
3. Enter your comments or product suggestions. 
4. Then select Next to submit feedback.

You can also use this article for more details: How do I submit feedback?

Furthermore, you can always visit our QuickBooks Blog page to stay updated on the latest news and features about QuickBooks. 

I'll be around if you have any questions or concerns about any processes using QuickBooks. Comment below to let us know. Take care always!