Posted inMicrosoft 365 apps
Posted inMicrosoft 365 suite
(Updated) Auto upgrade of shared calendars from legacy MAPI model to modern REST model [MC1287370]
Message ID: MC1287370 (Updated) Updated April 22, 2026: We have updated the timeline and content. Thank you for your patience. [Introduction]Microsoft is introducing an automatic upgrade for shared calendars in Outlook and Exchange Online, transitioning from the legacy MAPI-based model to…
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![(Updated) Auto upgrade of shared calendars from legacy MAPI model to modern REST model [MC1287370] 32 (Updated) Auto upgrade of shared calendars from legacy MAPI model to modern REST model [MC1287370]](https://mwpro.co.uk/wp-content/uploads/2024/08/pexels-steve-27594600-1024x683.webp)


![(Updated) Engage is retiring live events powered by Teams Live Events effective April 27th, 2026 [MC1227085] 35 (Updated) Engage is retiring live events powered by Teams Live Events effective April 27th, 2026 [MC1227085]](https://mwpro.co.uk/wp-content/uploads/2025/06/pexels-heyho-7546602-1024x683.webp)
![(Updated) Auto upgrade of shared calendars from legacy MAPI model to modern REST model [MC1287370] 36 (Updated) Auto upgrade of shared calendars from legacy MAPI model to modern REST model [MC1287370]](https://mwpro.co.uk/wp-content/uploads/2024/08/pexels-bess-hamiti-83687-36487-1024x683.webp)
