Cisco Cisco IP Contact Center Release 4.6.2 Installation Guide

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Active Directory Considerations for Common Ground Upgrades
In Windows Server 2003, Active Director domains can operate at three functional levels:
Windows 2000 mixed (includes domain controllers running Windows 2000, Windows NT
4.0, and Windows Server 2003). This is the default setting.
Windows 2000 native (includes domain controllers running Windows 2000 and Windows
Server 2003)
Windows Server 2003 (only includes domain controllers running Windows Server 2003)
Once all domain controllers are running on Windows Server 2003, you can raise the Domain
and Forest Functionality to Windows Server 2003 by opening Active Directory Domains and
Trusts, right-clicking the domain for which you want to raise functionality, and then clicking
Raise Domain Functional Level.
Note: Once you raise the domain functional level, domain controllers running earlier operating
systems cannot be introduced into the domain. For example, if you raise the domain functional
level to Windows Server 2003, domain controllers running Windows 2000 Server cannot be
added to that domain.
It’s important to ensure that prior to the upgrade of ICM to release 7.0(0), the Active Directory
mode in Windows 2000 be set to native mode. This is required by the ICM application, which
fails to create the necessary user accounts and groups in the domain if it isn’t at least in this
mode. ICM Setup, through the Domain Manager tool, has the ability to detect the domain mode
and prevents users from installing the application if it finds that the Active Directory functional
level (Windows Server 2003) or mode (Windows 2000) is running mixed.
References: 
(http://support.microsoft.com/default.aspx?scid=kb;en-us;325379)
This article discusses how to upgrade Microsoft Windows 2000 domain controllers to Microsoft
Windows Server 2003 and how to add new Windows Server 2003 domain controllers to Windows
2000 domains.
Internet Information Services (IIS) 6.0 Considerations for Common Ground Upgrades
When upgrading from Windows 2000 Server with IIS 5.0 to one of the following operating
systems:
Windows Server 2003 operating system, Standard Edition
Windows Server 2003 operating system, Enterprise Edition
Upgrade Guide Cisco ICM/IPCC Enterprise & Hosted Editions Release 7.0(0)
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Chapter 6: Setting Up the Hardware
Active Directory Considerations for Common Ground Upgrades