Question:
Why does the system change the Company field on the Vault User profile according to the Audit trail?
Answer:
This is working as designed. The Vault User record's field is showing as modified by the System because the Company field is a domain-level field. Vault syncs any value that exists there when creating a Vault User record in a Vault on the same domain.
No user is displayed for this event in the Audit trail. This is because the field is populated when the Domain User is created and Vault syncs the value when the Vault User is created.
Related Documentation:
Vault Help Documentation: N/A