The [pii_email_a427253221614b6547d5] error is a typical error that occurs when you use the Outlook email client to access numerous email accounts.People add several accounts to Outlook because it allows us to add various email accounts, whether they are personal or work accounts. https://techcrazee.com/how-to-fix-pii_email_a427253221614b6547d5-error-code-in-mail/