Posted inMicrosoft 365 suite
(Updated) Auto upgrade of shared calendars from legacy MAPI model to modern REST model [MC1287370]
Message ID: MC1287370 (Updated) Updated May 6, 2026: We have updated the 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 the modern…










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