MailExceptions errors with outlook.office365.com account

I have set up an account for my outlook.office365.com outlook.office365.com account and I am getting the following error: MailExceptions.OperationException: Set action is invalid for property.

I am now able to receive/send email and view my calendar - previously I couldn’t send - but I cannot see free/busy times in the calendar for my colleagues.

Hi Rod, what version of eM client are you currently using? Can you please make a screenshot of the error you’re seeing?
Also when the error occurs, can you please switch to the Log/History tab and copy the content of the log and post it here on the forum?

Thank you,
Paul.