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// graph-permissions · ChannelMessage

ChannelMessage.UpdatePolicyViolation.AllMicrosoft Graph permission · High risk

Allows the app to update Microsoft Teams channel messages by patching a set of Data Loss Prevention (DLP) policy violation properties to handle the output of DLP processing.

Application permission

High risk

Flag channel messages for violating policy. Allows the app to update Microsoft Teams channel messages by patching a set of Data Loss Prevention (DLP) policy violation properties to handle the output of DLP processing.

ID4d02b0cc-d90b-441f-8d82-4fb55c34d6bb
ConsentAlways needs admin consent
RiskAs an application permission this reaches every user's data in the tenant, without anyone signed in.

Grant it to an app

In the portal: App registrations › your app › API permissions › Add a permission › Microsoft Graph › Application permissions, then grant admin consent. Or with Graph PowerShell:

powershell5 lines
Connect-MgGraph -Scopes "Application.Read.All", "AppRoleAssignment.ReadWrite.All"
$graph = Get-MgServicePrincipal -Filter "appId eq '00000003-0000-0000-c000-000000000000'"
$app   = Get-MgServicePrincipal -Filter "appId eq '<your app's client id>'"
New-MgServicePrincipalAppRoleAssignment -ServicePrincipalId $app.Id `
    -PrincipalId $app.Id -ResourceId $graph.Id -AppRoleId "4d02b0cc-d90b-441f-8d82-4fb55c34d6bb"

Which apps already have it?

powershell6 lines
# Apps that hold ChannelMessage.UpdatePolicyViolation.All as an application permission
Connect-MgGraph -Scopes "Application.Read.All"
$graph = Get-MgServicePrincipal -Filter "appId eq '00000003-0000-0000-c000-000000000000'"
Get-MgServicePrincipalAppRoleAssignedTo -ServicePrincipalId $graph.Id -All |
    Where-Object AppRoleId -eq "4d02b0cc-d90b-441f-8d82-4fb55c34d6bb" |
    Select-Object PrincipalDisplayName, PrincipalId, CreatedDateTime

Other ChannelMessage permissions

Check every app in your tenant → Permission explainer

Sources