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// roles/azure · storage

Storage Actions Task Assignment ContributorAzure built-in role

Used by the Storage Actions assigner to create a Task Assignment on their target Storage Account, with RBAC privileges for Managed Identity

Role ID77789c21-1643-48a2-8f27-47f858540b51
CategoryStorage
Actions13
Data actions0

Before you assign it

  • It can give access to others. It allows Microsoft.Authorization/roleAssignments/write, so treat it as a privileged role and assign it through PIM where you can.

What it can do

PermissionWhat it allows
Microsoft.Authorization/*/readAny read operation on anything under Microsoft.Authorization
Microsoft.Insights/alertRules/*Every operation under Microsoft.Insights/alertRules
Microsoft.Resources/deployments/*Every operation under Microsoft.Resources/deployments
Microsoft.Resources/subscriptions/resourceGroups/readGets or lists resource groups.
Microsoft.Storage/storageAccounts/reports/read
Microsoft.Storage/storageAccounts/readReturns the list of storage accounts or gets the properties for the specified storage account.
Microsoft.Storage/storageAccounts/blobServices/readList blob services
Microsoft.Storage/storageAccounts/storageTaskAssignments/read
Microsoft.Storage/storageAccounts/storageTaskAssignments/write
Microsoft.Storage/storageAccounts/storageTaskAssignments/delete
Microsoft.Storage/storageAccounts/storageTaskAssignments/reports/read
Microsoft.Authorization/roleAssignments/writeCreate a role assignment at the specified scope.
Microsoft.Authorization/roleAssignments/deleteDelete a role assignment at the specified scope.

Assign it

Scope it as tightly as you can: a resource or resource group rather than the whole subscription.

azure cli
az role assignment create \
  --assignee "jane.doe@contoso.com" \
  --role "Storage Actions Task Assignment Contributor" \
  --scope "/subscriptions/<subscription id>/resourceGroups/<resource group>"
powershell3 lines
New-AzRoleAssignment -SignInName "jane.doe@contoso.com" `
  -RoleDefinitionName "Storage Actions Task Assignment Contributor" `
  -Scope "/subscriptions/<subscription id>/resourceGroups/<resource group>"
bicep7 lines
resource assignment 'Microsoft.Authorization/roleAssignments@2022-04-01' = {
  name: guid(resourceGroup().id, principalId, '77789c21-1643-48a2-8f27-47f858540b51')
  properties: {
    roleDefinitionId: subscriptionResourceId('Microsoft.Authorization/roleDefinitions', '77789c21-1643-48a2-8f27-47f858540b51')
    principalId: principalId
  }
}

Who already has it?

kql · azure resource graph
authorizationresources
| where type == "microsoft.authorization/roleassignments"
| where tostring(properties.roleDefinitionId) endswith "77789c21-1643-48a2-8f27-47f858540b51"
| project principalId = tostring(properties.principalId), principalType = tostring(properties.principalType), scope = tostring(properties.scope)

Other storage roles

Find the smallest role for a task →

Sources