KB : How to resolve 405 error occured at the removal of field mappings
This 405 error can be caused after clicking the delete icon of the field mappings if IIS is not properly configured.
To resolve this,
- Go to Programs and Features => Turn Windows Features On or Off
- Disable WebDAV Publishing under Internet Information Services => World Wide Web Services => Common HTTP Features
- Restart TFS4JIRA app pool in IIS Manager