Atlas Ink vs Microsoft Native Signatures: Do the Built-In Options Scale?

Microsoft 365 already includes two signature mechanisms: per-user Outlook roaming signatures and Exchange transport-rule disclaimers. Both work, but neither gives you central, Entra-driven, per-user templating with drift enforcement. Atlas Ink adds exactly that layer - running in your own Azure subscription and pushing each user's Outlook compose signature - without routing mail. This comparison weighs the built-in options against Atlas Ink.