Is there a way to save these credentials so I don't have to input them for each session?
Please take a look at this link: https://documentation.solarwinds.com/en/success_center/arm/content/configure-ad-scans.htm
As you can see, when setting up the AD resource, there is an option called “Changes will be done using account ...” I think you need to enter the service user you want to use here.
