Graph changes
Microsoft's edit ·
Microsoft's commit message in microsoftgraph/microsoft-graph-docs-contrib · commit debac01 · +7 −0 lines · also on GitHub
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> [!IMPORTANT]
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> Features in _preview_ status are subject to change without notice, and might not be promoted to generally available (GA) status. Don't use preview features in production apps.
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+## October 2026: New in preview only
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+### Mailbox import and export
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+- Added the **isHidden** property to the [mailboxFolder](/graph/api/resources/mailboxfolder?view=graph-rest-beta&preserve-view=true) resource to identify hidden mailbox folders.
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+- Use the existing **includeHiddenFolders** query parameter for [listing folders](/graph/api/mailbox-list-folders?view=graph-rest-beta&preserve-view=true) and [listing child folders](/graph/api/mailboxfolder-list-childfolders?view=graph-rest-beta&preserve-view=true). Set it to `true` to include both hidden and nonhidden folders.
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## September 2026: New and generally available
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### Calendars | Work hours and locations
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Microsoft's Markdown source from microsoftgraph/microsoft-graph-docs-contrib, © Microsoft Corporation, under CC BY 4.0. Changed lines with up to 3 unchanged lines around each; ChangeIntel kept this copy 10 Oct 23:34 UTC. The commit date is when the source changed, which can be hours or days before Learn published it.