ISAPI filter URLScan blocks certain HTTP Methods by default.
URLScan is not qualified or supported to work with RSA Archer.
Uncheck URLScan from IIS Manager -> Server (left side) -> ISAPI filters (icon)
Uninstall Microsoft URLScan from "Add/Remove Programs and Features"
Reconfigure URLScan to resolve known compatibility issues between URLScan and Archer.
If the configuration is:
If that is not the configuration, consult URLScan documentation for needed steps.
If "UseAllowVerbs" is the configuration, Then Edit [AllowVerbs] Section.
Add the following VERBS as per REST API specifications.
Save the file.
In a command prompt,
Since URLScan is not officially qualified or supported to work in conjunction with Archer, you will need to do your own testing to determine if additional changes need to be made to the URLScan.ini file.