What were some of the challenges that Microsoft faced when they transitioned to Office $365?$

Multiple Choice

One of the challenges that Microsoft faced was moving their Information Technology to using the cloud.

Some of the challenges that Microsoft faced when they transitioned to Office $365$ were keeping the user accounts secure and the fact that support was taken care of by the providers.

Microsoft had a difficult time selling the new service to organizations who were reluctant to change.

By transitioning to Office $365,$ Microsoft would not be able to predict what their revenues or profits would be$.$