API access for editing Site Collection List Alerts
So, the idea to allow Admins or developers access to get; set; existing and new user alerts on a site collection using the Client Side Object Model (CSOM). I can think of a handful of times from a support perspective this would have been handy when assisting end-users or Site Collection Admins. So please allow the CSOM access to the SPUser.Alerts on the site collection context.
Thank you for your input. We are happy to share that Alert CSOM APIs have been now included in the January 2017 CSOM release. Please check more details from following blog post – https://dev.office.com/blogs/new-sharepoint-csom-version-released-for-Office-365-january-2017.