Create Connection in adtribute
Open the adtribute App.
Go to "Connections" and click on "Create Connection".
Search for "LexOffice" and select it.
Name the Connection as you like, e.g. the Account Name.
Now you need to get the API Key from LexOffice.
Note: The Lexware Office XL Plan is needed to use the Public API.
Retrieve API Key from LexOffice
Login to LexOffice.
Click on the Settings Icon (Gear) on the top right.
Go to "Erweiterungen".
Navigate to "Weitere Apps" on the right.
Click on "Verwalten" for the "Public API".
Click on "API-Schlüssel erstellen" (top right).
Select "Schlüssel mit allen Berechtigungen" and click "Weiter".
Name it "Adtribute" and click "API-Schlüssel erstellen".
Copy and paste the Key into the field in the adtribute app.
Complete Connection
After you have pasted the API key into adtribute, you can 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.