If you are using 2FA within outlook, you will need to have your IT team complete the below:

Follow this guide to set up APP Password:

https://docs.microsoft.com/en-us/azure/active-directory/user-help/multi-factor-authentication-end-user-app-passwords

Then, you will need to enter the above details in XPLAN under Mceclip1--> Mceclip2--> Diary Sync --> Login

 

Mceclip0

Username - This is the email address linked to your MS Exchange

Password - This is the password you use to access your above email.