In May, the spotlight is again on the workload your users notice first – long before anyone opens Message Center.

Office clients are changing in several places at once: OneDrive, Excel, Word and Outlook.
A quiet but visible shift in sync scale, reliability, collaboration and secure communication.

What’s moving this month:

• OneDrive on Windows → Sync support towards around 1 million items per device for eligible hardware – large libraries suddenly become more realistic to handle.
• Excel Desktop → Without the required build, Power Platform Analytical Dataflows gradually lose connectivity from the end of May onwards.
• Word → Lock‑free coauthoring removes most paragraph‑level conflicts – collaborative writing becomes noticeably smoother.
• Outlook → New Outlook stores S/MIME certificates directly in contacts, and in Classic Outlook the expanded people card view is retired in June – the compact card remains.

In other words: changes your users will feel – whether you have communicated them yet or not.

📅 Rollout window:
Already rolling → June 2026 (including the Excel build deadline at the end of May and the people card retirement in June).

Short, human, and absolutely no release-note trauma.

The ChangeCockpit Freebie Edition as part of the Microsoft MVP Program.
All other Microsoft 365 workloads are available with a paid ChangeCockpit subscription.

Enjoy watching and stay tuned for more updates. 👇