We send contracts to our customers for signing via Adobe Sign. They receive emails from us asking them to open and sign the contract. The text contained in the email is automatically generated by Adobe.

In German, the formal form of address is “Sie”, but in the text the customer is sometimes addressed as “Sie” and then again with the casual “du”. Please see the screenshot, where I have marked it in yellow.
We would like our customers to be addressed uniformly with “Sie” in the automatic text.

Adobe Sign Support says they can not change it. Only possible with ETLA, which we have not.
As a professional company we can not adress customers with the casual "Du"....
They recommend this forum.
Sounds quite unusal and unsatisfactory to us.
I hope someone can help.