how to make for members to cant delete his post?

how to make for members to cant delete his post?

Hello,

Admin Panel => General => Forum then click on Categories and forums Modify Permissions click on Advanced Mode members ''Delete its own messages'' No then save do that on every forums

General>Categories and forums
Click on a forum name
Permissions tab
Delete its own messages: Uncheck it for members
Save
Repeat it for all forums.

thank you so much