<div>
what is forest functional level of forest having 2008 R2 domain?<br />
It should be at least windows 2003 or above, that is prerequisites for forest trust..<br />
<br />
You will also face issues if your DNS is not properly configured to resolve each other, you should configure conditional forwarder on each forest DC \ DNS server pointing to each other to work with correct name resolution
</div>


what is forest functional level of forest having 2008 R2 domain?
It should be at least windows 2003 or above, that is prerequisites for forest trust..

You will also face issues if your DNS is not properly configured to resolve each other, you should configure conditional forwarder on each forest DC \ DNS server pointing to each other to work with correct name resolution

<div>
@Mahesh &nbsp; , both domain and forest functional level are windows 2008 R2 &nbsp;.... the forest trust will be with a another &nbsp;2016 forest and domain ( migration )
</div>


@Mahesh   , both domain and forest functional level are windows 2008 R2  .... the forest trust will be with a another  2016 forest and domain ( migration )

adiloadilo

<div>
@mahesh &nbsp; Thank you , just wanted to confirm !
</div>


@mahesh   Thank you , just wanted to confirm !

<div>
<div class="content wysiwyg-content">
Are there any issues when creating an Active Directory Forest Trust between two forests ? one of the forests &nbsp;has windows 2008 R2 domain functional level and the other forest is new and has windows 2016 domain functional level &nbsp; ? &nbsp; Thank you
</div>
</div>


Are there any issues when creating an Active Directory Forest Trust between two forests ? one of the forests  has windows 2008 R2 domain functional level and the other forest is new and has windows 2016 domain functional level   ?   Thank you

Are there any issues when creating an Active Directory Forest Trust between two forests 2008 and 2016 domain functional level ?

This topic area includes legacy versions of Windows prior to Windows 2000: Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions including Windows Mobile.

Windows OS

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.

Active Directory

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.

Windows Server 2008

Windows 10 is a personal computer operating system featuring the "universal application architecture" (UAP); apps can be designed to run across multiple devices with nearly identical code, including PCs, tablets, smartphones, embedded systems, Xbox One, Surface Hub and HoloLens. Windows 10 also includes a virtual desktop system, a window and desktop management feature called Task View, the Microsoft Edge web browser, support for fingerprint and face recognition login, voice-based search (Cortana), new security features for enterprise environments, and DirectX 12 and WDDM 2.0 to improve the operating system's graphics capabilities for games.

Windows 10

Microsoft Azure is a cloud computing platform and infrastructure for building, deploying and managing applications and services through datacenters. It provides both platform-as-a-service (PaaS) and infrastructure-as-a-service (IaaS) services and supports many different programming languages, tools and frameworks, including both Microsoft-specific and third-party software and systems. Cloud Services is a PaaS environment and can be used to create scalable applications and services; there are specific software development kits (SDKs) provided by Microsoft for Python, Java, Node.js and .NET. Azure also has file and storage services, data management, analytics and DNS services.

Azure

Windows Server 2016 is the successor to Windows Server 2012 R2. Built upon the same core code as Windows 10, Windows Server 2016 brings enhancements in security, servicing, and connectivity. A particular focus on this release was hybrid-cloud scenarios, and has close ties to Azure and other Microsoft cloud initiatives. This does not detract from the many improvements that are available for on-premises-only deployments

Windows Server 2016 comes in Datacenter, Standard, and Essentials editions, and for servicing, has adopted windows 10's cumulative model. The new nano-server install is designed to be remotely managed and is designed to be kept current through continuous feature updates. The full GUI install operates similarly to windows 10's "Long Term Servicing Branch" (LTSB) model with cumulative security updates.

Windows Server 2016 has also shifted from a per-processor-and-CAL licensing model to a per-core-and CAL licensing model. This brings Windows Server's licensing more in line with Microsoft's other products and makes hybrid-cloud license planning easier as well.