In order to upload the validation file using the Plesk panel, you can use the ‘File manager’ option.
Navigate to the Files section in the right-side menu where you will see the folders structure of the files on your hosting server.
The default document root folder for the main domain of the Plesk panel is ‘httpdocs’. Thus, the ‘.well-known’ folder should be created there in ‘httpdocs’.
Select ‘New > Create Directory’ to make the new folder:
Then, create the ‘pki-validation’ subfolder in ‘.well-known’ folder as well.
The validation file can be uploaded into the ‘pki-validation’ folder using the Upload button in the same panel:
