The issue with ad-hoc email sending via Office365 has been confirmed as resolved. In case further issues are experienced, please reach out to the support team.

We have implemented a fix for the issue and are now monitoring the results. We sincerely apologize for the inconvenience.

We are aware of an issue preventing Playbooks customers from manually sending emails when using Office365 as their email provider. We have identified the root cause of the problem and will be deploying a fix before the end of the next week.