Google Drive is currently experiencing a widespread problem that is not limited to ICCSD, which is causing “NAME has shared a document on Google Docs with you.”
Do not click on the links that are being sent. They are not legitimate.
At this point, it’s unclear whether this is simply a problem with Google, or whether it’s a coordinating phishing attack. Google has acknowledged the problem and is working on a solution. In the meantime, here are some tweets from Google users around the country experiencing the same issue: