I wanted to limit the "Create Invoice" Button to the Billing group and I found that the code from Ahmed and Pravitha only removed the first instance of the button but I used the following code to remove both:

<xpath expr="//button[@name='%(sale.action_view_sale_advance_payment_inv)d'][1]" position="attributes">
    <attribute name="groups">account.group_account_invoice</attribute>
</xpath>
<xpath expr="//button[@name='%(sale.action_view_sale_advance_payment_inv)d'][2]" position="attributes">
    <attribute name="groups">account.group_account_invoice</attribute>
</xpath>

Hope this helps anyone trying to do the same thing. :)

The solution for the above query is:

inherit the sale_order view then add the below code

 <button name="%(sale.action_view_sale_advance_payment_inv)d" position="attributes">
    <attribute name="groups">sale.group_sale_manager,sale.group_sale_coo,sale.group_sale_ceo</attribute>
</button>

Hi Pravitha,you can check using the position for that button for example:

<xpath expr="//form/sheet/....button[num]" position="replace"/>

where, num = 0,1,2..

Or else you can check the id for that windows action and you can user that id as name at your xpath. like, I have assumed the id as 456.But this Id may be change once you upgrade or migrate the module.

<xpath expr="//form/sheet/header/button[@name='456']" position="replace"/>

I hope it will help you.

If avove 2 methods will not work then, you can go with redefining the view to achive the required functionality.