We're working to build a process for our shipping and receiving operations that updates an outlook calendar with times that shipments either arrive or go out. We have a workflow that runs every 15 minutes that:

1) Queries a SQL database for date/time values

2) Creates an Exchange item

But we are running into an issue where if the data in the SQL database is updated/changed, we just create a new exchange item. I know that the "update exchange item" only runs on items created in the same workflow, but I'm wondering if anyone has come up with a creative solution where we can update the event, or even delete and recreate the event on the calendar with the updated time. Any ideas?