// graph-permissions · TeamsAppInstallation

TeamsAppInstallation.ReadForChat.AllMicrosoft Graph permission · Medium risk

Allows the app to read the Teams apps that are installed in any chat, without a signed-in user. Does not give the ability to read application-specific settings.

Application permission

Medium risk

Read installed Teams apps for all chats. Allows the app to read the Teams apps that are installed in any chat, without a signed-in user. Does not give the ability to read application-specific settings.

ID	`cc7e7635-2586-41d6-adaa-a8d3bcad5ee5`
Consent	Always needs admin consent
Risk	Reads data across the tenant without a signed-in user.

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

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5Connect-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 "cc7e7635-2586-41d6-adaa-a8d3bcad5ee5"

Which apps already have it?

powershell6 lines

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6# Apps that hold TeamsAppInstallation.ReadForChat.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 "cc7e7635-2586-41d6-adaa-a8d3bcad5ee5" |
    Select-Object PrincipalDisplayName, PrincipalId, CreatedDateTime

Other TeamsAppInstallation permissions

Check every app in your tenant → Permission explainer

Sources

Microsoft Learn: Microsoft Graph permissions reference