"Client does not have permissions to send as this sender" error within Outlook.com
I recently was switched over to Office 365, but can not get my added Office 365 account to send email within the Outlook.com webmail interface. I can receive email, but the bounceback message I receive after sending email is:
"whole response: 550 5.7.60 SMTP; Client does not have permissions to send as this sender"
I have tried googling the issue, but have not found any answers as of yet. Has anyone else successfully added an Office 365 account to their Outlook.com webmail? Thank you.