(AzureCXP) fixes MicrosoftDocs/azure-docs#104879

Perfomed changes in line no. 160
changed to 
"$serverServicePrincipalObjectId = $serverServicePrincipal.ObjectId"

Performed changes in line no. 197 
changed to
$serverServicePrincipalObjectId = $serverServicePrincipal.ObjectId

Author: YashikaTyagii

articles/active-directory/managed-identities-azure-resources/how-to-assign-app-role-managed-identity-powershell.md

@@ -157,7 +157,7 @@ Connect-AzureAD -TenantId $tenantID
 
 # Look up the details about the server app's service principal and app role.
 $serverServicePrincipal = (Get-AzureADServicePrincipal -Filter "DisplayName eq '$serverApplicationName'")
-$serverServicePrincipalObjectId = $serverServicePrincipal.Id
+$serverServicePrincipalObjectId = $serverServicePrincipal.ObjectId
 $appRoleId = ($serverServicePrincipal.AppRoles | Where-Object {$_.Value -eq $appRoleName }).Id
 
 # Assign the managed identity access to the app role.
@@ -194,7 +194,7 @@ Connect-MgGraph -TenantId $tenantId -Scopes 'Application.Read.All','Application.
 
 # Look up the details about the server app's service principal and app role.
 $serverServicePrincipal = (Get-MgServicePrincipal -Filter "DisplayName eq '$serverApplicationName'")
-$serverServicePrincipalObjectId = $serverServicePrincipal.Id
+$serverServicePrincipalObjectId = $serverServicePrincipal.ObjectId
 $appRoleId = ($serverServicePrincipal.AppRoles | Where-Object {$_.Value -eq $appRoleName }).Id
 
 # Assign the managed identity access to the app role.