Hello @Taio Ray,
Thank you for posting your query on Microsoft Q&A.
Based on your description, I understand that you want to enroll a few computers in Microsoft Entra ID as Microsoft Entra Hybrid Join devices through the Entra Connect Wizard.
Yes, it is possible to sync only the required devices from on-premises to the cloud (Entra) by organizing them in a sync Organizational Unit (OU). Devices that you do not wish to sync to the cloud or enroll as Entra Hybrid Join can be placed in a non-sync OU. This ensures that when Entra Connect syncs data to the cloud, it excludes devices in non-sync OUs since they are outside the scope of sync OUs.
Please refer to the following documentation for more details: Prerequisites for Hybrid Join
If you have already synced all device objects to Entra, you can still remove specific devices from Entra by moving them to non-sync OUs.
Refer to this FAQ for more information: Why do users see error messages about deleted or disabled devices?
I hope this information is helpful. Please feel free to reach out if you have any further questions.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Thanks,
Raja Pothuraju.