// graph-permissions · TeamsTab

TeamsTab.ReadWriteForChat.AllMicrosoft Graph permission · High risk

Allows a Teams app to read, install, upgrade, and uninstall all tabs for any chat, without a signed-in user.

Application permission

High risk

Allow the Teams app to manage all tabs for all chats. Allows a Teams app to read, install, upgrade, and uninstall all tabs for any chat, without a signed-in user.

ID	`fd9ce730-a250-40dc-bd44-8dc8d20f39ea`
Consent	Always needs admin consent
Risk	Can change data across the whole tenant.

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 "fd9ce730-a250-40dc-bd44-8dc8d20f39ea"

Which apps already have it?

powershell6 lines

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6# Apps that hold TeamsTab.ReadWriteForChat.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 "fd9ce730-a250-40dc-bd44-8dc8d20f39ea" |
    Select-Object PrincipalDisplayName, PrincipalId, CreatedDateTime

Other TeamsTab permissions

Check every app in your tenant → Permission explainer

Sources

Microsoft Learn: Microsoft Graph permissions reference