Explains how Multi-Geo in Power BI and Microsoft Fabric lets SaaS vendors keep customer workspace data in a specific region instead of the tenant's home region. Covers the licensing prerequisites, what metadata still stays home-region, and when a full multi-tenant architecture is needed instead.

Covers the advanced end of Azure key management: Bring Your Own HSM, neutral escrow models, and governance at scale across RBAC, rotation, and audit logging. Closes with a decision framework for choosing a key control model and a look at what comes next, from confidential computing to post-quantum cryptography.

A look inside Azure's encryption-at-rest implementation, from default Microsoft-Managed Keys to Customer-Managed Keys in Azure Key Vault and Bring Your Own Key. Explains how key protection levels and rotation policies affect compliance, and why key control matters for SaaS vendors.

An introduction to data-at-rest encryption in the cloud, covering how AES-256 and key management actually work. Lays out the key control spectrum, from Microsoft-Managed Keys to Bring Your Own HSM, and why regulators like PCI DSS, HIPAA, and GDPR are pushing toward customer-controlled keys.