I am not looking for a date/ time field stamp just a time stamp.
So when a field is change to something from a drop down list it will time stamp it.
What I have.. but it changes with the time
If( [Current call status] = "Pending Dispatch from Vendor", ToTimeOfDay(Now())
The first is to use a Dynamic Form Rule
When multiple conditions are true [
when all of
When [my time stamp field] is blank
wnen [Current call status] is equal to Pending Dispatch from Vendor
Change [my time stamp field] to the current time
You can give that a try first. note that it will not work with Grid Edit, for it to work with Grid Edit you will need to use a different technique.