Update date and PowerShell commands in redundancy article

Updated the date and modified PowerShell commands for Azure authentication and SKU listing.

Author: VincentLiu777

articles/storage/files/files-redundancy.md

@@ -4,7 +4,7 @@ description: Understand the data redundancy options available for Azure file sha
 author: khdownie
 ms.service: azure-file-storage
 ms.topic: concept-article
-ms.date: 09/10/2025
+ms.date: 03/09/2026
 ms.author: kendownie
 ms.custom: references_regions
 # Customer intent: "As a data engineer, I want to select the appropriate data redundancy option for Azure file shares, so that I can ensure optimal availability and disaster recovery tailored to my organization's needs."
@@ -211,19 +211,33 @@ To view region supportability based on different billing models, use Azure Power
 # [PowerShell](#tab/azure-powershell)
 
 ```powershell
-# Login to Azure account
+Powershell: 
+
+# Login
 Connect-AzAccount
+# (Optional but recommended if you have multiple subs)
+# Set-AzContext -Subscription $subscriptionID
 
-# Track down the subscription ID in GUID format
 $subscriptionID = "your-subscription-id-number"
 
-# Get Token
-$token = Get-AzAccessToken
+# Get token (now SecureString by default)
+$secureToken = (Get-AzAccessToken).Token  # SecureString now [1](https://learn.microsoft.com/en-us/powershell/module/az.accounts/get-azaccesstoken?view=azps-15.3.0)
 
-# Invoke SRP list SKU API, and get the returned SKU list
-$result = Invoke-RestMethod -Method Get -Uri "https://management.azure.com/subscriptions/$($subscriptionID)/providers/Microsoft.Storage/skus?api-version=2024-01-01" -Headers @{"Authorization" = "Bearer $($token.Token)"}
+# Convert SecureString -> plaintext (Az 14 migration pattern)
+$ssPtr = [System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($secureToken)
+try {
+    $plainToken = [System.Runtime.InteropServices.Marshal]::PtrToStringBSTR($ssPtr)
+}
+finally {
+    [System.Runtime.InteropServices.Marshal]::ZeroFreeBSTR($ssPtr)
+}
+
+# Call List SKUs
+$uri = "https://management.azure.com/subscriptions/$subscriptionID/providers/Microsoft.Storage/skus?api-version=2024-01-01"
+$headers = @{ Authorization = "Bearer $plainToken" }
+
+$result = Invoke-RestMethod -Method Get -Uri $uri -Headers $headers
 
-# Filter the SKU list to get the required information, customization required here to get the best result.
 $filteredResult = $result | `
     Select-Object -ExpandProperty value | `
     Where-Object {