Compliance is the workload that most customers switch first. If you switch this workload to Intune, you can still require devices to evaluate settings from Configuration Manager. When you configure a compliance policy in Intune, enable it to require device compliance from Configuration Manager. Then you can use device compliance state to control conditional access to cloud-based resources. This configuration lets you start using the cloud services without changing the compliance checks you already have in Configuration Manager.
After compliance, the most common workloads are Office Click-to-Run apps, Client apps, and Windows Update policies.
When you switch an app workload to Intune, you can still deploy applications from Configuration Manager. This configuration also lets you assign apps in Intune. The experience is completely integrated as the new Company Portal shows both Configuration Manager and Intune apps. For more information, see Use the Company Portal app on co-managed devices.
For software updates, many customers aren't micromanaging them in Configuration Manager any more, but using Windows Updates for Business. Given that Windows updates live in the cloud, instead of syncing them down to the on-premises network and then distributing them out to clients on the internet again, the modern approach is to manage this workload entirely in the cloud.
For more information, see Co-management workloads.