This is complicated situation but don't worry. Follow these steps ;
Create an Outlook Profile
To create or re-create your Outlook profile, install and run the Office 365 Support and Recovery Assistant.
Log in with your Office 365 credentials.
Choose I need help setting up my Office 365 email in Outlook.
The Support and Recovery Assistant will run some checks, and when you're ready will create an Outlook profile with your email address.
Download and start Support and Recovery Assistant
Click Download now.
Run the installation program.
After installation, Support and Recovery Assistant will start automatically.
Use Support and Recovery Assistant
Choose I agree to accept the license agreement.
Select the app you want to get help with, and choose Next.
Select the support topic that best describes your issue, and then choose Next.
Sign in with your work or school account.
Wait for the series of tests to finish.
Review the test results, and do one of the following.
If the application succeeds in fixing your problem, follow the prompts and close the tool.
If the tests fail, the application will let you know the reason and suggest other solutions.