AdAuditPlus Service run as service user.

AdAuditPlus Service run as service user.

Hi!
My question is about AdAudit windows service. 
Is it true that if i will use service account that i have prepared for AdAuditPlus to be used for fetching logs from DCs, in AdAudit Windows service(Log on as), it will be automatically used in connection to DCs? 
So i will not be promoted for  entering credentials in AD domain configuration section in the web console? 

If this is true 
1) how about fully dedicated untrusted forests? 
2) Group Managed service account can be used for that? Should be possible.

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