To export the call log for all of your sub-accounts, to go Calls ▸ Export Calls. In the Export Call Data screen, enter the email then scroll down to the Filters section, Toggle the box Export all calls for all sub-accounts. In the Fields to Export section, select Account Name and Account ID. Click Build Report. An email will be sent with the call log from every sub-account and the spreadsheet can then be sorted by Account ID or Account Name.