Thanks for reaching out, and I understand you need help applying for an O+ account.
Are you using Microsoft 365 in your company and trying to request an Outlook/Office Plus account for business access? You usually apply for an O+ account through your company Microsoft 365 administrator.
They need to sign in to the Microsoft 365 Admin Center, go to Users, open Active users, and use Add user or Manage product licenses to assign the O+ license to your account. If self service is enabled, you can go to https://portal.office.com, open Account, and check Subscriptions where you can request the service shown in the list.
Best regards, Arlene D.