When using the Pontiac Macros, the IDs returned for Advertisers, Line Items, Creatives and Pixels will be Exchange IDs. To match these IDs to the Pontiac IDs, you must download the ‘Get Macro ID Mapping’ for your seat. To find this doc, open an Advertiser and select ‘New Creative’. Switch the dropdown to ‘Ad Server Tag Banner’ and you will see the following:

Click ‘Get Macro ID Mapping’ to download an excel with the IDs for your seat. This will download an excel with the IDs that looks like the following: