ERROR
The ArcWeb server throws the following error when a REST v2006 userID is used with REST v2006.1:
"The server encountered an internal error (Invalid userid) that prevented it from fulfilling this request."
REST v2006 requests are automatically redirected to REST v2006.1, which is incompatible with v2006 userIDs.
Article ID:000009755
Get help from ArcGIS experts
Download the Esri Support App