Each Azure subscription is associated with a single directory (although a directory can be associated with multiple subscriptions)

When you switch directories in Azure, you’re changing which Azure AD directory you’re working with. This can happen in several scenarios, such as:

• When you have multiple directories (for example, one for your organization and another for a partner or different environment).
• When you’re managing multiple tenants or when collaborating with other organizations.

To switch directories, you would typically go into the Azure portal, click on your account settings (usually in the top-right corner), and choose the directory you want to work with.