My environment:
UiPath 2022.10.7
UiPath.Mail.Activities 1.21.1
Outlook 2016
2 accounts have been added to Outlook, primary and secondary. A standard signature is configured for the main account, but no signature is selected for the secondary account.
I use the Send Mail activity in Use Desktop Outlook App to send emails with the email body from a Word document.
The problem is that the email is sent from a secondary account with the standard signature automatically added from the main account.