![Auto upgrade of shared calendars from legacy MAPI model to modern REST model [MC1287370]](https://mwpro.co.uk/wp-content/uploads/2025/06/pexels-mccutcheon-1209843-1024x683.webp "Auto upgrade of shared calendars from legacy MAPI model to modern REST model [MC1287370] 1")
Posted inMicrosoft 365 suite
Auto upgrade of shared calendars from legacy MAPI model to modern REST model [MC1287370]
Message ID: MC1287370 [Introduction]Microsoft is introducing an automatic upgrade for shared calendars in Outlook and Exchange Online, transitioning from the legacy MAPI-based model to the modern REST-based model. This server-side upgrade will improve calendar sync reliability, performance, and consistency for…
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![M365 and Microsoft Teams: Unified management of app and agent availability in Teams, Outlook, and the Microsoft 365 app [MC796790]](https://mwpro.co.uk/wp-content/uploads/2025/06/pexels-yankrukov-5215398-1024x683.webp "M365 and Microsoft Teams: Unified management of app and agent availability in Teams, Outlook, and the Microsoft 365 app [MC796790] 3")
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