Granular permissions for Microsoft Azure user

You can specify the minimum permissions set using the following script:  

$role = [Microsoft.Azure.Commands.Resources.Models.Authorization.PSRoleDefinition]::new()
$role.Name = 'Veeam Restore Operator'
$role.Description = 'Permissions for Veeam Direct Restore to Microsoft Azure'
$role.IsCustom = $true
$permissions = @(
'Microsoft.Storage/storageAccounts/listkeys/action',
'Microsoft.Storage/storageAccounts/read',
'Microsoft.Network/locations/checkDnsNameAvailability/read',
'Microsoft.Network/virtualNetworks/read',
'Microsoft.Network/virtualNetworks/subnets/join/action',
'Microsoft.Network/publicIPAddresses/read',
'Microsoft.Network/publicIPAddresses/write',
'Microsoft.Network/publicIPAddresses/delete',
'Microsoft.Network/publicIPAddresses/join/action',
'Microsoft.Network/networkInterfaces/read',
'Microsoft.Network/networkInterfaces/write',
'Microsoft.Network/networkInterfaces/delete',
'Microsoft.Network/networkInterfaces/join/action',
'Microsoft.Network/networkSecurityGroups/read',
'Microsoft.Network/networkSecurityGroups/write',
'Microsoft.Network/networkSecurityGroups/delete',
'Microsoft.Network/networkSecurityGroups/join/action',
'Microsoft.Compute/locations/vmSizes/read',
'Microsoft.Compute/locations/usages/read',
'Microsoft.Compute/virtualMachines/read',
'Microsoft.Compute/virtualMachines/write',
'Microsoft.Compute/virtualMachines/delete',
'Microsoft.Compute/virtualMachines/start/action',
'Microsoft.Compute/virtualMachines/deallocate/action',
'Microsoft.Compute/virtualMachines/instanceView/read',
'Microsoft.Compute/virtualMachines/extensions/read',
'Microsoft.Compute/virtualMachines/extensions/write',
'Microsoft.Resources/checkResourceName/action',
'Microsoft.Resources/subscriptions/resourceGroups/read',
'Microsoft.Resources/subscriptions/resourceGroups/write',
'Microsoft.Resources/subscriptions/locations/read'
)
$role.Actions = $permissions
$role.NotActions = (Get-AzureRmRoleDefinition -Name 'Virtual Machine Contributor').NotActions
$subs = '/subscriptions/00000000-0000-0000-0000-000000000000'
$role.AssignableScopes = $subs
New-AzureRmRoleDefinition -Role $role

a. Start Windows command line (CMD.exe or PowerShell.exe) with Administrative privileges
b. Navigate to Veeam Backup installation folder (by default: C:\Program Files\Veeam\Backup and Replication\) and then to “Backup” subfolder, so the full path should look like: "C:\Program Files\Veeam\Backup and Replication\Backup":

cd C:\Program Files\Veeam\Backup and Replication\Backup

c. Type following command: Veeam.backup.manager.exe REGISTERAZUREACCOUNT. The account is now ready for use.