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I have been asked below<br />
<br />
there IS ONE (Windows server 2003)and &nbsp;the new &nbsp;replacement server built &nbsp;for is &nbsp;Windows 2008 R2 since Windows 2003 is EOS, &nbsp;if it is promoted to DC then that would upgrade the Schema. Please let us know if we can proceed.<br />
<br />
what does EOS mean, also why it is necessary to upgrade schema
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I have been asked below

there IS ONE (Windows server 2003)and  the new  replacement server built  for is  Windows 2008 R2 since Windows 2003 is EOS,  if it is promoted to DC then that would upgrade the Schema. Please let us know if we can proceed.

what does EOS mean, also why it is necessary to upgrade schema

ACTIVE DIRECTORY

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.