New Outlook: Users Say It's Broken—Microsoft response.

Sadly, we may have to turn off the new Outlook client in our tenant due to the inability to manage signatures for 13k users. There is a major operational gap between classic Outlook and new Outlook.

In classic Outlook, we can automate signature updates using PowerShell and SCCM, ensuring consistent branding and compliance across business units. With the new Outlook storing signatures in the cloud and removing local file access, we’ve lost the ability to:

• Deploy HTML signatures with dynamic AD attributes
• Enforce branding and legal disclaimers
• Manage signatures without relying on costly third-party tools

This issue affects not just branding, but legal compliance and user experience. In order to continue down the path of new Outlook in our tenant, at minimum we need either the ability to manage it or a no-cost add-in that covers this gap.