Dell PowerProtect DD Management Center (DDMC) 7.9 Installation and Administration Guide

If a local user owns multiple Storage Units, and the Tenant Units that contain those Storage Units do not all belong to the same Tenant, this is definitely a misconfiguration and always results in a security breach (either data or administrative isolation is violated). This situation can also result in Tenant usage report errors.

The effects of the misconfiguration depend on which Tenants actually own the data in the affected Storage Units. If the data in all of these Storage Units is actually owned by a single Tenant, then there is no data isolation security breach (each Tenant can access only their own data), but the usage reports for the Tenants will be incorrect. Some Tenants will see usage for Storage Units that belong to other Tenants, and some Tenants will not see usage for some of their Storage Units. In addition, some Tenants will be able to view the Storage Unit names and usage of other Tenant's Storage Units. So this is also an administrative isolation security breach.

If some Storage Units contain data for one Tenant, and other Storage Units contain data for a different Tenant, then different Tenants have been given the same user credentials to access their Storage Units, so there is a data isolation security breach, since each Tenant can access the other Tenant's data in the Storage Units owned by the shared local user. However the usage reports for each Tenant will be correct in this case.