In Microsoft Ads navigate to: Conversion Tracking -> Conversion Goals and click on "Create Conversion Goal"
Give your conversion goal a name and select type=Offline conversions. Click Next.
Select the scope, value, count, conversion window that suits you best and check the box "Include in Conversions".
Click on Save and head back to Nimbata. Under Integrations select "Microsoft Ads".
Click on the Button labeled "Connect Microsoft Ads"
A pop up window will appear were you can select the Microsoft Account you wish to connect. Make sure that the account you connect is the one you previously setup the conversion action, as described above.
Click on Yes to give permission to Nimbata to send call data to your Microsoft Account.
After completing the process, you will return back to Nimbata and see a confirmation message that your account has been successfully connected.
From the drop-down menu select the Ad Account and Conversion you created in the previous steps, enable the switch "Push Data to Microsoft Ads" and select which calls should be included.
That's it! Your Microsoft Ads account will be populated once a day with call conversions from Nimbata!