From Apple iOS 11 Security Technical Implementation Guide
Part of PP-MDF-991000
Associated with: CCI-000366
The Apple iOS Mail app can be configured to support multiple email accounts concurrently. These email accounts are likely to involve content of varying degrees of sensitivity (e.g., both personal and enterprise messages). To prevent the unauthorized and undetected forwarding or moving of messages from one account to another, Mail ActiveSync Exchange accounts can be configured to block such behavior. While users may still send a message from the Exchange account to another account, these transactions must involve an Exchange server, enabling audit records of the transaction, filtering of mail content, and subsequent forensic analysis.
Review configuration settings to confirm "Allow messages to be moved" is disabled.
This check procedure is performed on both the Apple iOS management tool and the Apple iOS device.
Note: If an organization has multiple configuration profiles, the check procedure must be performed on the relevant configuration profiles applicable to the scope of the review.
In the Apple iOS management tool, verify "Allow messages to be moved" is unchecked under the Exchange payload.
Alternatively, verify the text "
Install a configuration profile to prevent Exchange messages from being moved or forwarded between email accounts.
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