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Apple iOS/iPadOS 17 must implement the management setting: not allow messages in an ActiveSync Exchange account to be forwarded or moved to other accounts in the Apple iOS/iPadOS 17 Mail app.


Finding ID Version Rule ID IA Controls Severity
V-258349 AIOS-17-011400 SV-258349r927730_rule Medium
The Apple iOS/iPadOS 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. SFR ID: FMT_SMF_EXT.1.1 #47
Apple iOS/iPadOS 17 Security Technical Implementation Guide 2023-10-10


Check Text ( C-62090r927728_chk )
Review configuration settings to confirm "Allow messages to be moved" is disabled.

This check procedure is performed on both the Apple iOS/iPadOS management tool and the iPhone and iPad.

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/iPadOS management tool, verify "Allow messages to be moved" is unchecked under the Exchange payload.

On the iPhone and iPad:
1. Open the Settings app.
2. Tap "General".
3. Tap "VPN & Device Management".
4. Tap the Configuration Profile from the Apple iOS/iPadOS management tool containing the Exchange policy.
5. Tap "Mail".
6. Tap the "name of the Exchange account".
7. Verify "Prevent Move" is set to "Yes".

If "Allow messages to be moved" is checked in the Apple iOS/iPadOS management tool or the Exchange policy on the iPhone and iPad has "Prevent Move" set to "No", this is a finding.
Fix Text (F-62014r927729_fix)
Install a configuration profile to prevent Exchange messages from being moved or forwarded between email accounts.