I don't know what version you are. If it is the latest version 7.0, you can click on the navigation bar toolbar, select Account Management, and set your signature file 1 as the default signature. Please enjoy it.

It may not have been replaced correctly, so please try again in the following ways:

1. On the computer desktop, open the enterprise WeChat;

2. Enter the enterprise WeChat and click more in the lower left corner;

3, in the options, click on the work signature;

4. Click the expression on the left and select the expression package;

5. In the text box, enter the content and click OK.