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Please check with dcdiag command about the status of all domain controllers &nbsp;and share the results
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I've attached the results of the dcdiag from the 2 DC's - i hope this is what you've asked for.<br />
<a href="https://filedb.experts-exchange.com/incoming/2017/03_w10/1149664/dcdiag.txt" target="_blank" class="file-inline" title="dcdiag.txt (10 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>dcdiag.txt</a>
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dcdiag.txt

<div>
thanks for sharing the info. Report shows issues with DC replication among other DCs, you will need to first fix the DC issues.
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<div>
Sill question - but from the logs are you able to point me in the right direction as far as how to fix the replication?<br />
<br />
I ran repadmin /replicate dest-server source-server DC=,DC=. and its run successfully
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<div>
Nothing to resolve. You cannot raise the forest functional level higher than the LOWEST domain controller. So that 2003 DC means your forest functional level at 2003 is already as high as it can go.
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So i need to demote the 2003 server before i can raise the functional level higher? &nbsp;<br />
<br />
Is that what your saying.
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<div>
Resolve it by upgrading all your domain controllers to the DFF/FFL that you want to raise to. I recommend at least 2008 R2
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<div>
Thank you - decommissioning the server worked.
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<div>
<div class="content wysiwyg-content">
Hi,<br />
I'm getting the following error when trying to raise forest functionality on a Server 2008 R2 server.<br />
<br />
you cannot raise the forest functional level. <br />
either this forest includes domain controllers that are not running the appropriate version of Windows, <br />
or one or more domains in the forest are still at Window 2000 mixed functional level or Windows Server 2003 interim<br />
<br />
Current Forest Level<br />
Windows Server 2003<br />
<br />
We also run a Server 2003 domain controller alongside the 2008. &nbsp;I've followed steps online as per the link below:<br />
<a href="https://technet.microsoft.com/en-us/library/cc730985(v=ws.11).aspx" rel="ugc">https://technet.microsoft.com/en-us/library/cc730985(v=ws.11).aspx</a><br />
<br />
Can anyone provide any advice on how to get around this?<br />
<br />
Thanks
</div>
</div>


Hi,
I'm getting the following error when trying to raise forest functionality on a Server 2008 R2 server.

you cannot raise the forest functional level. 
either this forest includes domain controllers that are not running the appropriate version of Windows, 
or one or more domains in the forest are still at Window 2000 mixed functional level or Windows Server 2003 interim

Current Forest Level
Windows Server 2003

We also run a Server 2003 domain controller alongside the 2008.  I've followed steps online as per the link below:
https://technet.microsoft.com/en-us/library/cc730985(v=ws.11).aspx

Can anyone provide any advice on how to get around this?

Thanks

Raising Forest Functional Level

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).

Windows Server 2003

A domain controller is a server that responds to security authentication requests within a computer network domain. It is a network server that is responsible for allowing host access to domain resources. It authenticates users, stores user account information and enforces security policy for a domain

Domain Controller

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.