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// graph-permissions · Contacts

Contacts.ReadWriteMicrosoft Graph permission · High risk

Allows the app to create, read, update, and delete all contacts in all mailboxes without a signed-in user.

Application permission

High risk

Read and write contacts in all mailboxes. Allows the app to create, read, update, and delete all contacts in all mailboxes without a signed-in user.

ID6918b873-d17a-4dc1-b314-35f528134491
ConsentAlways needs admin consent
RiskAs an application permission this reaches every user's data in the tenant, without anyone signed in.

Delegated permission

Medium risk

Have full access to user contacts . Allows the app to create, read, update, and delete user contacts.

IDd56682ec-c09e-4743-aaf4-1a3aac4caa21
ConsentUsers can consent, if your consent settings allow it
RiskReads or changes the signed-in user's content, limited to what that user can access.

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 "6918b873-d17a-4dc1-b314-35f528134491"

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 "Contacts.ReadWrite"

Which apps already have it?

powershell6 lines
# Apps that hold Contacts.ReadWrite 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 "6918b873-d17a-4dc1-b314-35f528134491" |
    Select-Object PrincipalDisplayName, PrincipalId, CreatedDateTime
powershell6 lines
# Apps with delegated consent for Contacts.ReadWrite
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 "Contacts.ReadWrite" } |
    Select-Object ClientId, ConsentType, PrincipalId

Other Contacts permissions

Check every app in your tenant → Permission explainer

Sources