scheduledend field on custom activity in CRM 2011 is being set to null on update

Question

When I try to update a custom activity, the scheduledend date field is being set to null.

I'm using the generic Entity class to create and update the custom activity.

This occurs from a console application and a web service.

Answer 1

This appears to be because I was also setting the scheduledstart date field during both create and update to null .

If I either drop the inclusion of the scheduledstart date field in Entity class when calling update, or set it to a value, the scheduledend date field update goes through just fine.

Another solution as pointed out in the comments would be to just use early-bound entity types generated by the Crm Service Util found in the SDK.