Q: What is the difference between "Automatic" and "Mandatory"?
A: An "automatic" add-on will like a "mandatory" add-on start when SAP Business One start but it is possible to go to go to Administration > Add-on > Add.on manager and stop an "Automatic" add-on again (not possible with mandatory). Similar if an "Automatic" add-on crash user are able to use the B1 Client if he/she choose (this is not possible with a mandatory add-on unless you are manager). We recommend you run B1UP as mandatory.
Q: I've logged in as manager and set the add-on to Automatic but when I log in add-on does not start.
A: This is normal behavior from SAP. Go to the add-on user setting and change startup mode from "Manual" to "Default"