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masthan khanmasthan khan 

For case i want to update a page layout with all the buttons disabled when ever the case status is closed.

Hai,
In object case i want to update a page layout with all the buttons disabled when ever the case status is closed.

With Regards
Masthan Khan
Veena Penugonda 7Veena Penugonda 7
you can do this by adding a validation rule for case close status, user should not be making any changes.
Raj VakatiRaj Vakati
You can use closed case page layouts and remove the button from the close case layouts 
https://classic.certifiedondemand.com/case-page-layouts-status/
https://werewolfonsfdc.blogspot.com/2013/07/another-way-to-skip-case-close-page.html
https://focusonforce.com/case-close-page-layouts/