Hi Immer,
Thanks for posting in Q&A.
- Could we check whether the updates that we deploy to these 30% of the clients are what it needs or not?
- May we know that if we change the update channel after we enable Microsoft 365 Apps clients to receive updates from Configuration Manager?
Here is a helpful article for your reference:
https://learn.microsoft.com/en-us/mem/configmgr/sum/deploy-use/manage-office-365-proplus-updates#change-the-update-channel-after-you-enable-microsoft-365-apps-clients-to-receive-updates-from-configuration-manager
This is a detailed update guide for deploying Office-365 for your reference:
https://www.prajwaldesai.com/deploy-office-365-updates-using-sccm/
Note: This link is not an official Microsoft article, so Microsoft cannot provide guarantee and support for this。
Thanks for your time.
If the response is helpful, please click "Accept Answer" and upvote it.