Cloud tenancy is the way a cloud provider separates one customer’s users, permissions, and stored data from another customer’s environment. In a multi-tenant cloud, many organizations use the same underlying platform, so tenancy controls define what each account can see, manage, and share. This isolation can be logical rather than physical, which makes configuration and access control essential.
Cloud tenancy matters because weak separation can turn a small mistake into a data exposure. In real attacks, criminals often do not need to break the cloud platform itself; they exploit stolen credentials, overly broad roles, weak sharing settings, or tenant misconfiguration to reach files, mail, or backups. Defenders reduce this risk with strong identity controls, least-privilege permissions, tenant-aware logging, segmentation, and careful review of sharing and administrative rights. In practice, secure tenancy is what keeps one customer’s compromise from becoming everyone’s problem.