Final answer:
An Azure subscription can only trust one directory at a time.
Step-by-step explanation:
An Azure subscription can trust only one directory
An Azure subscription is associated with an Azure Active Directory (Azure AD) tenant, and it can only trust one directory at a time. The tenant represents a distinct instance of Azure AD and contains the security and identity information for the subscription.
Multiple subscriptions can be associated with the same directory, but each subscription can only trust one directory. This ensures proper authentication and authorization for resources within the subscription.