Create Connection in adtribute
Open the adtribute App.
Go to "Connections" and click on "Create Connection".
Search for "Active Campaign" and select it.
Name the Connection as you like, e.g. the Account Name.
Now you need to get the API Key from Active Campaign.
Retrieve API Key and Account Name from Active Campaign
Login to Active Campaign.
Navigate to Settings (Gear Icon) on the bottom left.
Open "Developer".
API Key
Copy the API Key by clicking on "Copy API Key".
Paste the API Key into the right field within the adtribute App.
Account Name
Copy the URL, e.g. "https://adtribute-tracking.activehosted.com".
Paste the URL into the "Account Name" field within the adtribute App.
Adjust the URL by deleting the prefix "https://" and suffix ".activehosted.com", so it only says the Account Name "adtribute-tracking".
Complete Connection
After you have pasted the API Key and the Account Name, just click on "Next". It will load for a short bit and tell you on the bottom right if the Connection was successful and show up within your Connections.
You have to repeat those steps for every Active Campaign account, you wish to connect.