Rajeev Pentyala – Technical Blog on Power Platform, Azure and AI

Power Platform administrator can enable the Block unmanaged customizations environment setting in the Power Platform admin center. This setting allows system administrators to prevent unmanaged customizations in Dataverse environments.

This feature can be enabled or disabled from the Features area of the environment settings for environments in the Power Platform admin center. By default, this setting is disabled. 

•  By blocking unmanaged customizations, you ensure the changes to the environment are only coming from approved application lifecycle management (ALM) processes that have sufficient safety, visibility, and auditing.

When the setting is enabled, these operations are blocked for the environment:

• Import of unmanaged solutions into the environment are blocked.
• Creation of new solution components like apps, tables, and forms are blocked.
• Adding unmanaged changes to existing managed components are blocked.
• Any unmanaged changes result in an error returned to the user, such as: “This environment doesn’t allow unmanaged customizations. This was a choice made by your admin, and certain actions won’t be available or will be view only.”

The following operations aren’t blocked by this feature:

• Change of environment variable, enabling or disabling components. For example, turning Power Automate flows on or off, assigning ownership, or sharing of table records.
• Solutions operations like remove Remove an unmanaged layer.
• Creation and export of unmanaged solutions.

Please refer this link for known limitations.

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