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Carefully plan which Exchange Server 2003 servers should use Remote Desktop for Administration or Remote Administration (HTML) for remote management.
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Restrict Remote Desktop for Administration or Remote Administration (HTML) access on Exchange Server 2003 servers that are facing the Internet (for example, limiting access to a predefined IP address or set of IP addresses).
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Have a person in the vicinity of the server that is being managed remotely assist the administrator in case network connectivity is lost.
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Use care when modifying network configurations over a Remote Desktop for Administration connection.
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Use disconnect and reset timeout values for Remote Desktop for Administration connections.
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Plan and coordinate remote administration efforts to reduce the number of attempts to access Exchange Server 2003 servers remotely.
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Do not implement Terminal Services on an Exchange server solely to manage Exchange Server 2003 remotely.
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Use the advanced view of the ESM when using multiple routing and administrative groups.
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Use RPC over HTTPS or Remote Desktop for Administration with high encryption when managing Exchange Server 2003 servers remotely over public networks using ESM.