Marketing Cloud Account Engagement is designed to prevent data corruption and conflicting changes by implementing an asset locking mechanism. When a user begins editing an asset, such as an Email Template, the system places a lock on it. If another user attempts to edit the exact same template while it is locked, they are not able to edit it simultaneously. Instead, they are presented with a prompt that gives them the option to either take over the editing session (which forces the original user out) or open the asset in a read-only mode.

The statement "True" is incorrect because the system's architecture explicitly prohibits simultaneous editing by multiple users. The platform's conflict resolution—prompting a second user to take over or view in read-only—is a mechanism to manage sequential, not simultaneous, editing sessions.

1. Salesforce Help: Considerations for Editing Assets

Reference: In the section detailing asset editing behavior, the documentation states, "Only one user can edit an asset at a time. If you try to edit an asset that another user is editing, you’re prompted to take over the editing session or open the asset in read-only mode." This directly confirms that simultaneous editing is not possible.

Source: Official Salesforce Vendor Documentation for Marketing Cloud Account Engagement.