As a global administrator, you can lock a signature so that branch administrators do not modify it
As a global administrator, you can now restrict the modification of any signature to subsidiary administrators.
This allows you to configure a signature with your custom settings and target users and branch administrators will not be able to change any settings for this signature. (style, design, assignment, status.)
To block a signature for the subsidiary administrators:
Connect to the subsidiary of your choice.
Identify the signature you wish to block.
On the right panel, click on the corresponding button, to prevent the signature from being modified by the subsidiary administrators.