Hello Hidekazu Hoshi
Welcome to Microsoft Q&A Platform, thanks for posting your query here.
Based on your ask for Azure AD cloud only identities, check this document once: https://techcommunity.microsoft.com/t5/fslogix-blog/fslogix-profile-containers-for-azure-ad-cloud-only-identities/ba-p/3739352
You can see some examples in for getting Cloud Only working: https://blog.itprocloud.de/Using-FSLogix-file-shares-with-Azure-AD-cloud-identities-in-Azure-Virtual-Desktop-AVD/
Hope this helps.
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