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Removed

V-223347

Outlook must use remote procedure call (RPC) encryption to communicate with Microsoft Exchange servers.

Finding ID
O365-OU-000002
Rule ID
SV-223347r508019_rule
Severity
Cat II
CCE
(None)
Group Title
SRG-APP-000575
CCI
CCI-001967
Target Key
(None)
Documentable
No
Discussion

This policy setting controls whether Outlook uses remote procedure call (RPC) encryption to communicate with Microsoft Exchange servers. If you enable this policy setting, Outlook uses RPC encryption when communicating with an Exchange server. Note: RPC encryption only encrypts the data from the Outlook client computer to the Exchange server. It does not encrypt the messages themselves as they traverse the Internet. If you disable or do not configure this policy setting, RPC encryption is still used by default. This setting allows you to override the corresponding per-profile setting.

Fix Text

Set the policy value for User Configuration >> Administrative Templates >> Microsoft Outlook 2016 >> Account Settings >> Exchange >> Enable RPC encryption to "Enabled".

Check Content

Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Outlook 2016 >> Account Settings >> Exchange >> Enable RPC encryption is set to "Enabled". Use the Windows Registry to navigate to the following key: HKCU\software\policies\microsoft\office\16.0\outlook\rpc If the value for enablerpcencryption is set to REG_DWORD = 1, this is not a finding.