After installing IE8.0, sometimes customers might forget or lose the service monitor key. It is not stored in plain text in web.config. Please follow the instruction to reset it properly.
Step 1, please find the web.config file.
Step 2, in the Web.config file, please find the following lines where configures the Service Monitor API key and replaces the value accordingly.
This value is an SHA-256 hash of what was entered during the initial setup of the IE Web Server.
To reset you can use a tool such as https://emn178.github.io/online-tools/sha256.html to create a new hash value. Some common hashes that may have been used are:
admin = 8c6976e5b5410415bde908bd4dee15dfb167a9c873fc4bb8a81f6f2ab448a918
netbrain = f04570b4673536f71b2b43c2a0c9de5cdbf2f21aee3987e39a8b9f01828b455d
Step 3, once the API key is set, please restart the IIS service.
Important !!! - Service Monitor Agent Configuration
Once you reset the API key in the Web.config, you will need to reinstall the Service Monitor Agent on each server in order to properly set the API key in the configuration file. It is encrypted during the installation and cannot be reset in cleartext.