Recently, a client of ours was looking to have a daily email sent to each user that has an overdue task, or a task that is set to expire. The email had a specific format. Each task needed direct links and had to be grouped by the date that it was due. Since it was an on-premises Project Server and SharePoint 2013 farm, it was not too difficult to build and embed the solution into the farm. I took care of this by building a SharePoint timer job, which leveraged a SharePoint search to retrieve all tasks where the due date was before the next business day. Once deployed, and activated, this timer job was automatically scheduled to run every morning, and the SharePoint admins could trigger it manually. Everything worked great.
Another client of ours was looking for a solution exactly like this, except they were strictly SharePoint Online / Project Online. They had no on-premises farm, there were no real servers to even speak of. One option would have been to create a PowerShell script or .NET executable to run the code, and have that process run as a Scheduled Task on some server. However, there were no servers. Even if they did, what was the point of being in the cloud, if you are still stuck with a foot (or process) on the ground?
So, I turned to Microsoft Azure, and that’s where Azure Functions came into play.
Azure Functions are programs or code snippets that run in the cloud. They can run on schedules or can be triggered by different types of events (HTTP request, item added to Azure Blob Storage, Excel file saved to OneDrive, etc.). Think of this as a Windows Scheduled Task that can be triggered by modern events and activities.
Note that I could have also used Azure WebJobs to accomplish this, but I felt that Azure Functions had many positives. Azure Functions are easy for the client to maintain, it has automatic scaling, they only pay for how long the code executes, it supports WebHooks and can be easily triggered via an HTTP request.
Send Custom Emails from SharePoint Online
For this solution, I created the Azure Function in Visual Studio pre-compiled with the SharePoint Online client-side object model (CSOM) DLLs. The solution was straightforward, as it would use CSOM to query SharePoint Online’s search service for all overdue tasks and tasks due within the next business day. It would then do some logic to build the email content based on the assigned users, and then send out emails using SendGrid. SendGrid is built into Microsoft Azure, so configuring it was a breeze, and you get 25,000 free emails a month!
Once deployed, I configured the Azure Function to run on schedule (like before), and it can even be triggered by an HTTP request, so putting an HTTP request in a SharePoint site workflow or Microsoft Flow means that any site user would be able to trigger this function as needed.
Long gone are the days where there are integration servers laying around in the data center waiting to get more processes to help them consume more of their over-allocated resources. Most servers, virtual machines, really, are now dedicated to a specific application, and shouldn’t share their resources with one-off processes.
Azure Functions is a great server-less architecture solution to these problems. Whether you need to send emails, calculate metrics, or analyze big data, Azure Functions can be a solution for you. Learn more about how BlumShapiro can help your organization with issues like this.
Brent Harvey has over 10 years of software development experience with a specific focus on SharePoint, Project Server, and C #and web development. Brent is an Architect at BlumShapiro Consulting. Brent is a Microsoft Certified Solutions Expert in SharePoint 2013, Solutions Associate in Windows Server 2012, Specialist in Developing Azure Solutions and Professional Developer in SharePoint 2010.