Adding Missing Intergrated Security to the list description

Author: MattB-msft

powerapps-docs/developer/common-data-service/xrm-tooling/use-connection-strings-xrm-tooling-connect.md

@@ -70,6 +70,7 @@ CrmServiceClient svc = new CrmServiceClient(ConnectionString);
 |`StoreName` or `CertificateStoreName`|Specifies the store name where the certificate identified by thumbprint can be found. When set, Thumbprint is required.|
 |`Thumbprint` or `CertThumbprint`| Specifies the thumbprint of the certificate to be utilized during an S2S connection. When set, AppID is required and UserID and Password values are ignored.|
 |`SkipDiscovery`|Specifies whether to call instance discovery to determine the connection uri for a given instance. As of NuGet release Microsoft.CrmSdk.XrmTooling.CoreAssembly Version 9.0.2.7, default = true. Older versions default to false. <br/> Note: If set to true, it is important that the user provide the correct and accurate URI for the target instance.|
+|`Integrated Security`|Specifies to use current windows credentials to attempt to create a token for the instances. As of NuGet release Microsoft.CrmSdk.XrmTooling.CoreAssembly Version 9.1.0.21|
 
 > [!NOTE]
 > <b>When using the `OAuth` AuthType\AuthenticationType</b><br/>