To export contacts out of MediaOS, click the Accounts option on the left side of the screen, then hit the Accounts tab that appears at the top of the screen. 

Next, click the magnifying glass icon and select the list or grouping of advertisers you would like to export. 

Once you’ve made your selections, hit the orange Filter tab, then Batch Action > Export Contact Information. 

When prompted, name your export and click the orange Export tab.

Navigate to the Today tab on the left side of the screen, where you can download the export. Note: The export will include all possible fields that are exportable, which will be reflected in the file. This includes contact info, advertiser info, etc.