I want to track SLAs (like time to first respone and time to resolution) but my service team may recieve requests via phone in some situation where the request can not be logged to the JIRA Service Desk system immediately. I want to either change the date/time that the issue is created to reflect when the incident was truly discovered OR have separate custom fields to track this and use these to measure SLAs.
Is there:
a) any way to create an issue and then change the creation date?
or b) use a custom field, e.g. detection date/time to track start time and another field, e.g. response time, to end the SLA