Recently setup a customer on quickbooks online, however they have not received the email from quickbooks. does anyone have a solution to this issue?

Hey there info-ocbookkeepi,

It's always a pleasure to see new faces in the QuickBooks Community, Welcome! QuickBooks Online is a powerful program that can help make running your business smoother. I would be happy to provide some information.

If your situation is in regards to sending invoices to your customers, this has become a known issue for which our Development Team is currently investigating. I encourage you to contact us outside of Community for personal interaction and review of the issue, so we can get it resolved as soon as possible. You can reach us by following one of these methods:

Schedule a Callback or start a Chat: click (?)Help in the upper right > type and enter "Contact support" into the QB Assistant > click Contact Us > explain your situation > click Let's Talk > choose Get a callback or Start a Chat.
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If you have any other questions, feel free to reach out here.