Here is an article on how to prepare the upgrade as well as a video on the contact sync module.
For optimal performance, Office 365 subscribers need to change the update channel (aka frequency) for Outlook updates. Sometimes, Microsoft moves features ahead of Act!’s development.
Microsoft KB – Version and build numbers of update channel releases
Microsoft KB – Overview of update channels for Office 365 ProPlus
https://docs.microsoft.com/en-us/DeployOffice/overview-of-update-channels-for-office-365-proplus