Creating Sharepoint web part
If you maintain a Sharepoint website, it is very easy to create a web part inside it exposing the forthcoming events from an Indico category. First off, you need to create an XML web part. After that, you should add a link, like the one below, to the XML link part.
https://indico.cern.ch/export/categ/5883.xml?from=today&to=tomorrow
(for more, see HTTP Export API)
After that, simply add the link below in the XSL link:
https://indico.cern.ch/export.xsl
The example result: