[ISS Support Case] Invalid Historian Registration Login Credentials

Last updated: October 17th, 2025

Description

Client reached out due to the following error in the logs on the Tier 2 Historian: "9356206 9/30/2025 10:18:48 AM 5480 9880 Warning aahCfgSvc Please update Historian Server properties with valid credentials (on client computer) (hostname) [hostname]; Status.cpp; 640]"

Author: Kevin Modlin
Published: October 17th, 2025

Details:

Product: Historian

Version: 2020 R2

Solution: [Solution is visible below when you're logged in and have a current subscription]

Date Created:	09/30/2025
Case:	99426

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