A data management and storage (DMS) cluster of peer DMS nodes provides domain shares and authentication for different domains. Each DMS node includes a domain manager and multiple containers, each container including a domain share. Each container associated with a domain may provide an authentication service for authenticating users for a different domain to access domain shares of the domain, such as by contacting a domain controller of a compute infrastructure associated with the domain. The domain manager controls the creation and deletion of containers and their domain shares. The domain manager also provides a proxy service for the containers for communication with client devices of different domains external to the DMS cluster.