How to Fix QuickBooks MAPI Password Errors Easily Errors in the QuickBooks MAPI password can be annoying, particularly if they prevent you from sending invoices, reports, or estimates by email. Misconfigured email settings, out-of-date software, modifications to email account security standards, or incompatibilities between QuickBooks and the default email client, such as Outlook or Gmail, are the usual causes of these issues. The inability to send emails, frequent password prompts, or error messages that read "MAPI Error: Password Required" are some of the symptoms. For More : https://a2autocare.com/article/quickbooks-mapi-keeps-asking-for-password/