Microsoft has postponed the rollout of enhanced compliance and security features for voicemail messages in Microsoft Exchange to late May 2025. The updates include changes to the "From" field to comply with RFC 6854 and the addition of "Unverified" and "External" tags for messages from external PSTN calls and federated tenants. No admin action is required.
Applies to: Exchange Online · Microsoft Teams
Source: mc.merill.net — data via Merill Fernando's open archive (MIT).