In Microsoft Entra ID (Azure AD), the per-user device cap is controlled in Devices > Device settings. The SC-300 materials describe that administrators can configure ''Users may join devices to Azure AD'' and the ''Maximum number of devices per user''. The guide notes that this limit defaults to five and is used to ''control how many devices a user can join or register in Azure AD''; when users reach the limit, ''they cannot add additional devices until the limit is increased or an existing device is removed.'' For scenarios like field or sales staff who use multiple devices, the study content recommends adjusting this value to meet business needs. Because A. Datum's sales users hit the current cap and a requirement states ''Increase the maximum number of devices that can be joined or registered to Azure AD to 10,'' the fix is to change the tenant's Device settings---not User settings, Access reviews, or Security defaults. This aligns with the exam objective to configure device settings for Azure AD join and registration and addresses the precise symptom reported by users.