Symptom
You have done some changes on Sales Order screen for some layout you have, however when you go to "Assign Layout" under Adaptation Mode you can't see the Sales Order BO to be selected.
Environment
SAP Cloud for Customer
Reproducing the Issue
1. Log into he system with admin user.
2. Go to Sales Order screen.
3. Start adaptation Mode and do your changes in the layout. (Read-only, Mandatory...)
4. Go to layouts tab then click on "Assign Layouts".
5. Click on Business Object dropdown field.
6. Sales Order BO is missing.
Cause
The Sales Order Screen is embedded to Sales Quote BO.
Resolution
Hence, the assignments of the page layouts for Sales Orders needs to be done on the Sales Quote BO level.
Keywords
Sales Order; BO; Layout; Missing; Appearing; Assign , KBA , AP-RC-UIF-FLX , Page Layout & Key User Configuration , How To