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Hello Experts, 
Vulnerability with regards to our OWA web site using RC4 cipher algorithms in SSL cipher suites has been identified. &nbsp;I have been reading on how to remediate this issue and I’m thinking that disabling RC4 is the way to go. &nbsp;Our Exchange server is running Windows Server 2008 with service pack 2. &nbsp;We are running Exchange 2007. &nbsp;I have been reading on how to disable the RC4 cipher algorithms and everything I have read states I need to modify the following registry keys: 
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Ciphers\RC4 128/128] 
&quot;Enabled&quot;=dword:00000000 
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Ciphers\RC4 40/128] 
&quot;Enabled&quot;=dword:00000000 
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Ciphers\RC4 56/128] 
&quot;Enabled&quot;=dword:00000000 
The problem I’m running into is these registry keys do not exist. &nbsp;Should I create the following subkeys and dword values within each sub-key? 
Sub-keys: 
RC4 128/128 
RC4 40/128 
RC4 56/128. 
 
Dword Values: 
“Enabled”=dword:00000000 
 
Any clarification will be greatly appreciated. 
 
Nick
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Hello Experts,
Vulnerability with regards to our OWA web site using RC4 cipher algorithms in SSL cipher suites has been identified.  I have been reading on how to remediate this issue and I’m thinking that disabling RC4 is the way to go.  Our Exchange server is running Windows Server 2008 with service pack 2.  We are running Exchange 2007.  I have been reading on how to disable the RC4 cipher algorithms and everything I have read states I need to modify the following registry keys:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Ciphers\RC4 128/128]
"Enabled"=dword:00000000 
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Ciphers\RC4 40/128]
"Enabled"=dword:00000000
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Ciphers\RC4 56/128]
"Enabled"=dword:00000000 
The problem I’m running into is these registry keys do not exist.  Should I create the following subkeys and dword values within each sub-key?
Sub-keys:
RC4 128/128
RC4 40/128
RC4 56/128.

Dword Values:
“Enabled”=dword:00000000

Any clarification will be greatly appreciated.

Nick

Disabling RC4 Cipher On Windows Server 2008 Service Pack 2

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

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.