Sales invoices to ONE customer are sent but not received. Previously, they received them fine. Clients using QB are experiencing same. Is there a patch/update for this?

Hi there, info661. Thanks for bringing this to our attention.

We have received several reports about this, and our Product Engineers are working to resolve it as soon as possible. While they do, I suggest getting in touch with our Customer Care Team so they can add you to the list of users who are affected.

To reach them, click on Help(?) at the upper-right corner and select Contact Us. You can also check out this link for more details and ensure the availability of our supports: QuickBooks Online Support.

Thank you for your patience. Please let me know if you require any additional QuickBooks assistance. I'll be available to help you further if you need it. Have a wonderful day.

Come and joint the conversation. They’ve been fixing the issue since February!

https://quickbooks.intuit.com/learn-support/en-uk/transactions/my-emailed-invoices-are-not-being-received-by-my-customers/00/794417