I am trying to change the Source of my Datasets from Google Sheets to Microsoft Excel Online.
I do not see anywhere that I can add the link to the new source or even remove the old source to add a new one.

Clicking Google Sheets, only shows me the sheets in the previously linked account. The other two options, Excel and CSV, are upload file options.
The Configure Tab is grayed out as shown.
In the account settings, no account is linked in the Integration, and in the Data Hub, no option to import as seen here:
