When you add a new user account to an existing company, an invitation e-mail is sent to the specified e-mail address for account verification.
E-mail addresses that have already been used in the portal, including those that have not yet been confirmed, cannot be used for this purpose.
As long as this verification e-mail has not been confirmed, the account will have the Status: invited:
Example screenshot: UCConnect Accounts – Status: invited – More functions
Under "More functions" you have the option to resend the invitation e-mail or to withdraw the invitation:
Example screenshot: UCConnect – More functions – Resend invitation mail