Microsoft Advertising Now Offers Multi-Account Google Importshttps://about.ads.microsoft.com
If you have multiple Microsoft Advertising accounts, you’ll see the option to select from a list of accounts you have access to. Then you can sign into Google Ads, and decide if you want to import your entire Google Ads account or just specific campaigns (note that specific ad groups can’t be selected).
Then from there, you can proceed with Google Import as you would before! Import with all the default options or customize the import the same way as you would for a single account. You can still view granular import schedule and history for these multiple imports, as well as get a summary of all your multi-account Google Imports in the Accounts Summary page.