Today when we open the CRM forms observed that Save and Save & Close were not visible. When we are checking the things we found that one of our colleagues has enabled Auto-Save feature in CRM.
If you enable Auto-Save – Save and Save & Close buttons will not be displayed. Refer the below screen shot for more information
Auto Save Disabled
Save and Save & Close buttons are visible
Auto Save Enabled
Save and Save & Close buttons are not visible.
Hope this helps.