azureblog.co.uk
← cd ~/roles
// roles/azure · storage

Storage File DelegatorAzure built-in role

Allows for generation of a user delegation key, which can then be used to create a shared access signature for a file or Azure file share that is signed with Entra ID credentials.

Role ID765a04e0-5de8-4bb2-9bf6-b2a30bc03e91
CategoryStorage
Actions1
Data actions0

What it can do

PermissionWhat it allows
Microsoft.Storage/storageAccounts/fileServices/generateUserDelegationKey/actionReturns a user delegation key for the file service

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 File Delegator" \
  --scope "/subscriptions/<subscription id>/resourceGroups/<resource group>"
powershell3 lines
New-AzRoleAssignment -SignInName "jane.doe@contoso.com" `
  -RoleDefinitionName "Storage File Delegator" `
  -Scope "/subscriptions/<subscription id>/resourceGroups/<resource group>"
bicep7 lines
resource assignment 'Microsoft.Authorization/roleAssignments@2022-04-01' = {
  name: guid(resourceGroup().id, principalId, '765a04e0-5de8-4bb2-9bf6-b2a30bc03e91')
  properties: {
    roleDefinitionId: subscriptionResourceId('Microsoft.Authorization/roleDefinitions', '765a04e0-5de8-4bb2-9bf6-b2a30bc03e91')
    principalId: principalId
  }
}

Who already has it?

kql · azure resource graph
authorizationresources
| where type == "microsoft.authorization/roleassignments"
| where tostring(properties.roleDefinitionId) endswith "765a04e0-5de8-4bb2-9bf6-b2a30bc03e91"
| project principalId = tostring(properties.principalId), principalType = tostring(properties.principalType), scope = tostring(properties.scope)

Other storage roles

Find the smallest role for a task →

Sources