How to find enrollment URL for Apple Configurator?
I am not sure if I understand your question right but I assume you are looking for the Snow Device Manager public URL, right? Normally it is something like "sdm.company_name.com" or "mdm.company.pl" During your SDM installation you have to configure this URL and it should be already known by SDM administrator.
It is correct that the external URL is used for enrollment. But remember to import all serial numbers in advance into SDM, or enrollment will fail.
If customer has a DEP account, the recommended way is to only add devices to DEP without enrollment and enroll the devices thru DEP at start-up.
Can you please give me instructions how to prepare CSV file (its structure, required fields etc.) to import devices to SDM.
You only need 2 columns, one for device name, the second with device serials. Example:
Retrieving data ...