In 10.6 version or below there should be 2 esriConfig.xml files created. ESRI maps plugin has been extended to support user modifications to a separate esriConfig.xml file that can persist through upgrades. The mechanism for this is that users now store their modified esriConfig.xml file in a plugin, using the Strategy plugin architecture to preserve the file through upgrades and to take precedence over the out of the box esriConfig.xml file. More details you can find in KB45064. So the config file in plugins directory should contain key and token (at a pinch), but the second one should contain all information about shapes, layers and details included in map visualization.
In attachments on this page there are already prepared files. Only thing which is needed to be done is to put in right locations.
File from folder "1" should be placed here: C:\Program Files\MicroStrategy\Web ASPx\WEB-INF\xml\config
File from folder "2" should be placed here: C:\Program Files\MicroStrategy\Web ASPx\plugins\ConnectorForESRIMap\WEB-INF\xml\config
Please remember to edit file from folder "2" and add there your key for ESRI Map services.
