# Document Revisions
****
| Date | Change | Location |
| --- | --- | --- |
| October 2018 | Added support for Exchange Server 2016; added Exchange Edge Transport nodes\. | Throughout doc; architecture diagram and template updates |
| March 2018 | Updated Active Directory to use the Windows Server 2016 AMI; updated template parameters\. | Template updates |
| September 2015 | In the sample templates, changed the default type for Active Directory and RD Gateway instances from m3\.xlarge to m4\.xlarge for better performance and price\. | Template updates |
| August 2015 | Updated DAG guidance and deployment scenarios\. | [Deployment Options](scenarios.md) |
| March 2015 | Optimized the underlying Amazon VPC design to support expansion and to reduce complexity\. | Architecture diagram and template updates |
| January 2015 | Initial publication | – |
## Notices
This deployment guide is provided for informational purposes only\. It represents AWS's current product offerings and practices as of the date of issue of this document, which are subject to change without notice\. Customers are responsible for making their own independent assessment of the information in this document and any use of AWS's products or services, each of which is provided "as is" without warranty of any kind, whether express or implied\. This document does not create any warranties, representations, contractual commitments, conditions or assurances from AWS, its affiliates, suppliers or licensors\. The responsibilities and liabilities of AWS to its customers are controlled by AWS agreements, and this document is not part of, nor does it modify, any agreement between AWS and its customers\.
The software included with this paper is licensed under the Apache License, Version 2\.0 \(the "License"\)\. You may not use this file except in compliance with the License\. A copy of the License is located at [http://aws\.amazon\.com/apache2\.0/](http://aws.amazon.com/apache2.0/) or in the "license" file accompanying this file\. This code is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied\. See the License for the specific language governing permissions and limitations under the License\.