Mail fetching stopped working a couple of days ago. I see a notification prompting me to set up an error folder, but the instructions are unclear, so I'm not sure if I configured it correctly.

Should the folder be created under the Inbox of the email account used for the service desk, or does it need to be created on the server?

After creating the folder under the e-mail's Inbox and attempting to resume fetching, I receive the following error:
"Mail fetching schedule cannot be started because a schedule is already running in the background."
As a result, the fetching service does not start.

We are still using EWS for authentication to the mailbox and are running on an on-premises server. I have installed the latest patch.