Using classic Outlook for Windows in business environments
Hi Fatima,
Thank you for the screenshot.
You are low on OneDrive storage which is 5 GB for free users. You will need to move your files either to an external drive or to your computer. To do so, please click on the link below and log in with your email account which you are using for the Outlook account in question, once moved, after some hours, you will be able to send and receive emails:
Thank you.