Hi there, @OBO_Usering,

Allow me to share some insights about reactivating customers. Inactive customers can only be reactivated by doing it manually. As much as how hassle-free it is, however, it's unavailable in QuickBooks Online (QBO).

Let me guide you on how to reactivate customers.

Here's how:

1. Go to the Sales tab, then select Customers.
2. Click the Gear icon to filter, then tick the Include inactive.



3. Locate the customer you want to reactivate and select Make active.



For detailed information, please visit: Add and manage customers in QuickBooks Online.

You may also want to learn how to send statements to show customers summaries of their invoices, payments, credits, and balances: Create and send customer statements in QuickBooks Online.

Should you need further assistance with managing your customers, feel free to leave a reply. I'm here to help you anytime. Have a great day ahead!