When users try to inactivate an account, the users will be prompted with an Error message
“Activation(s)/Inactivation(s) did not succeed. Please check & try again.”
In order to Inactive a Chart of Account, you may perform the following:
1. Uncheck the Use Account Numbers checkbox in Setup > Accounting > Accounting Preferences page under the General tab. Once this has been disabled, users can then go back to the list of Chart of Accounts and set the accounts to Inactive