If you are configuring the OM module and need to configure the sales order start sequence, Oracle EBS allows you to configure by order type, here are the steps to configure.
As a first step we will define a sequence name.
Enter the responsibility of Order Management -> Configure -> Documents -> Define.
We will use the initial value as 123, after making the Order Type link record with the chosen sequence.
After this configuration it is only generate the Sales Order that it will be saved starting from the configured sequence (123)