// graph-permissions · TeamsAppInstallation

TeamsAppInstallation.ReadWriteForChatMicrosoft Graph permission · Medium risk

Allows the app to read, install, upgrade, and uninstall Teams apps in chats the signed-in user can access. Does not give the ability to read application-specific settings.

Delegated permission

Medium risk

Manage installed Teams apps in chats. Allows the app to read, install, upgrade, and uninstall Teams apps in chats the signed-in user can access. Does not give the ability to read application-specific settings.

ID	`aa85bf13-d771-4d5d-a9e6-bca04ce44edf`
Consent	Needs admin consent
Risk	Can make changes. Check the scope is as narrow as possible.

Ask for it when signing in

Delegated permissions act as the signed-in user, so the app can never do more than that user can.

powershell1 line

Connect-MgGraph -Scopes "TeamsAppInstallation.ReadWriteForChat"

Which apps already have it?

powershell6 lines

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6# Apps with delegated consent for TeamsAppInstallation.ReadWriteForChat
Connect-MgGraph -Scopes "Application.Read.All", "Directory.Read.All"
$graph = Get-MgServicePrincipal -Filter "appId eq '00000003-0000-0000-c000-000000000000'"
Get-MgOauth2PermissionGrant -All |
    Where-Object { $_.ResourceId -eq $graph.Id -and ($_.Scope -split " ") -contains "TeamsAppInstallation.ReadWriteForChat" } |
    Select-Object ClientId, ConsentType, PrincipalId

Other TeamsAppInstallation permissions

Check every app in your tenant → Permission explainer

Sources

Microsoft Learn: Microsoft Graph permissions reference