v1.0UpdatedMail · November 2026

mailFolder: delta, message: delta: updated

Microsoft Graph monthly changes Watch complete announcement More this month

What Microsoft changed

Month-dated announcement

Updated national cloud availability in China operated by 21Vianet for the mailFolder: delta and message: delta methods. Use these methods to track incremental changes to mail folders and messages within a mail folder.

In Graph PowerShell

Microsoft Graph PowerShell 2.41.2 command metadata

Command	Module	Request	Least-privileged permissions
`Get-MgUserMailFolderChildFolderDelta`	`Microsoft.Graph.Mail`	`GET /users/{user-id}/mailFolders/{mailFolder-id}/childFolders/delta`	Not listed
`Get-MgUserMailFolderDelta`	`Microsoft.Graph.Mail`	`GET /users/{user-id}/mailFolders/delta`	Mail.ReadBasic (delegated), Mail.ReadBasic.All (application)
`Get-MgUserMailFolderChildFolderMessageDelta`	`Microsoft.Graph.Mail`	`GET /users/{user-id}/mailFolders/{mailFolder-id}/childFolders/{mailFolder-id1}/messages/delta`	Not listed
`Get-MgUserMailFolderMessageDelta`	`Microsoft.Graph.Mail`	`GET /users/{user-id}/mailFolders/{mailFolder-id}/messages/delta`	Mail.ReadBasic (delegated), Mail.ReadBasic.All (application)
`Get-MgUserMessageDelta`	`Microsoft.Graph.Mail`	`GET /users/{user-id}/messages/delta`	Mail.Read (application), Mail.Read (delegated)

Install with Install-Module Microsoft.Graph.Mail. Permissions come from the SDK's metadata; check Microsoft's API page before granting them.

API documentation

Public source · November 2026
Security | Case management (beta): 1 API change passage Shared reference: https://learn.microsoft.com/en-us/graph/whats-new-overview
Public source · November 2026
Device and app management | Cloud PC (beta): 2 API change passages Shared reference: https://learn.microsoft.com/en-us/graph/whats-new-overview
Public source · November 2026
Teamwork and communications | Messaging (beta): 3 API change passages Shared reference: https://learn.microsoft.com/en-us/graph/whats-new-overview
Public source · November 2026
Security | Content management (beta): 1 API change passage Shared reference: https://learn.microsoft.com/en-us/graph/whats-new-overview
Public source · November 2026
Security | Data security and compliance (beta): 1 API change passage Shared reference: https://learn.microsoft.com/en-us/graph/whats-new-overview
Public source · November 2026
Security (beta): 3 API change passages Shared reference: https://learn.microsoft.com/en-us/graph/whats-new-overview

Source: Microsoft Graph monthly changes. Collection coverage. The publisher supplies a month, not an exact announcement day.

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What Microsoft changed

In Graph PowerShell

API documentation

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