Update New-AzADDomainService.md (#18102)

* Update New-AzADDomainService.md

* Update New-AzADDomainService.md

Author: BethanyZhou

src/ADDomainServices/examples/New-AzADDomainService.md

@@ -10,4 +10,20 @@ youriADdomain youriAddomain.com westus   Enterprise
 
 Create new ADDomainService
 
+### Example 2: Create new ADDomainService with certificate 
+```powershell
+# Variables
+$replicaSet = New-AzADDomainServiceReplicaSet -Location westus -SubnetId /subscriptions/********-****-****-****-**********/resourceGroups/yishitest/providers/Microsoft.Network/virtualNetworks/aadds-vnet/subnets/default\
+$certificateBytes = get-content "certificate.pfx" -AsByteStream
+$base64String = [System.Convert]::ToBase64String($certificateBytes) 
+$ldaps_pfx_pass = "MyStrongPassword"
+New-AzADDomainService -name youriADdomain -ResourceGroupName youriAddomain -DomainName youriAddomain.com -ReplicaSet $replicaSet -LdapSettingLdaps Enabled -LdapSettingPfxCertificate $base64String -LdapSettingPfxCertificatePassword $($ldaps_pfx_pass | ConvertTo-SecureString -Force -AsPlainText)
+```
+
+```output
+Name          Domain Name       Location Sku
+----          -----------       -------- ---
+youriADdomain youriAddomain.com westus   Enterprise
+```
 
+Create new ADDomainService with certificate

src/ADDomainServices/help/New-AzADDomainService.md

@@ -46,6 +46,24 @@ youriADdomain youriAddomain.com westus   Enterprise
 
 Create new ADDomainService
 
+### Example 2: Create new ADDomainService with certificate 
+```powershell
+# Variables
+$replicaSet = New-AzADDomainServiceReplicaSet -Location westus -SubnetId /subscriptions/********-****-****-****-**********/resourceGroups/yishitest/providers/Microsoft.Network/virtualNetworks/aadds-vnet/subnets/default\
+$certificateBytes = get-content "certificate.pfx" -AsByteStream
+$base64String = [System.Convert]::ToBase64String($certificateBytes) 
+$ldaps_pfx_pass = "MyStrongPassword"
+New-AzADDomainService -name youriADdomain -ResourceGroupName youriAddomain -DomainName youriAddomain.com -ReplicaSet $replicaSet -LdapSettingLdaps Enabled -LdapSettingPfxCertificate $base64String -LdapSettingPfxCertificatePassword $($ldaps_pfx_pass | ConvertTo-SecureString -Force -AsPlainText)
+```
+
+```output
+Name          Domain Name       Location Sku
+----          -----------       -------- ---
+youriADdomain youriAddomain.com westus   Enterprise
+```
+
+Create new ADDomainService with certificate
+
 ## PARAMETERS
 
 ### -AsJob