Referring to your screenshot, the username discovered by the GEP installer, arcgis, does not contain .\ The .\arcgis you see in the dialog indicates that the user arcgis is a local user, not a domain or AD user (e.g. MyDomain\user1234). I have worked to recreate your issue, using a local user arcgis on Windows 2012, installing ArcGIS Server 10.2 and the 10.2 release of GEP. I made sure that the local user�??s password included an �??_�?? character. Unfortunately, I was unable to reproduce the issue. The GEP installer is discovering the user configured to run the �??ArcGIS Server�?? service. GEP will create and configure its service (�??ArcGIS GeoEvent Processor�??) to run using the same account. That is why you are unable to change the username from within the GEP installation wizard; you must authenticate by providing the discovered user�??s password and allow GEP to create and configure the Windows service used to run the GEP product. The two Windows system services are run using the same operating system account as part of the prerequisite that GEP is run as an extension to ArcGIS Server. At this point your best option is to open an incident with Esri Technical Support. They have the ability to remotely view your system and work with you to resolve the product installation issue. Best Regards - RJ I've the same problem. Is there a known solution to this problem?
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