Why is my colleague unable to access a document that I shared with them in SharePoint?

1. Verify that you have the correct permissions to share documents to others.
2. Check if the document was uploaded to the right location in SharePoint.
3. Verify that the colleague has been given the correct permissions to access the document.
4. Ensure that the document does not have anyVirus protection software that would prevent it from being opened.
5. Check if the colleague has a valid account and is logged into the correct domain.