Topic: How can I modify the user's access powers?

You have specified the powers of the user, such as the possibility of making a sales invoice,
But I need to prevent the user from changing the delivery store.

How can I, in any file, i can edit?

Re: How can I modify the user's access powers?

You need to change in more files. especially  we have three kind of operations,
1. sales order to delivery and delivery to invoice,
2. direct sales delivery
3. direct invoice which makes a delivery note.

so you have to do following steps to do that.
1. add a new column in users table and make the users in it, which helps to identify the users whom you want to prevent editing it, 
2. and get the field value for each logged in users and identify the user whether restricted or allowed to access.
3. There you need to get the flag and set it in side the sales module files, whether allowing it or not.

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