Icon (tick mark on a page with a pen) appear in slide sorter view

[Pilou-bcn]

Hello;
I have receive a document and all the slides in the slide sorter view appear
with an icon on the top right corner. The icon looks like a page with a pen
and a tick mark on top of it.
I would like to remove this icon. What do I need to do.
Thanks in advance for your help.

 

[Echo S]

That sounds almost like the "compatibility checker" icon or the "mark as
final" icon, but those icons aren't applied to individual slides and they
don't show up in slide sorter view.

I wonder if it's a Sharepoint thing? Are these slides connected to a
Sharepoint slide library? I'm wondering if it's the icon indicating that it
checked to insure you have the latest version of a slide.