Hi Wright,
Brandon Armstrong answered this for me some time ago on a different thread. Here is what he worked out
Hi Lori,
After speaking with you over the phone and then doing some additional testing, we found the following workflow to successfully append the data from your exported file geodatabase to the existing feature layer referenced by your survey while maintaining the Editor Tracking information.
These steps start after data from all previous surveys have been exported to file geodatabase format using ArcGIS Online...
1. Login to ArcGIS Online or your portal in ArcGIS Enterprise and select 'Content' from the top panel of choices
2. Select the survey folder which contains the feature layer and form of the survey which you will be appending data to
3. Select the feature layer within the folder > Settings > disable 'Keep track of who created and last updated features' > Save
4. Open ArcGIS Pro
5. Add the previously downloaded file geodatabase data and any table containing attachments to the Current Map
IMPORTANT: Instead of using Field Mapping in the Append gp tool options, ensure that the source field(s) have the same name as the target field they will be appended too. For instance, if Field_1 of the source dataset (file geodatabase feature class) will be going to Field_2 of source dataset (feature service), rename Field_1 within feature class, to Field_2 prior to proceeding.
6. Run the Disable Editor Tracking geoprocessing tool against your File Geodatabase data.
7. From the Contents pane—Right-click the feature class from your downloaded dataset > Design > Fields.
8. Check 'Read-Only' for all editor tracking fields (CreationDate, Creator, EditDate, Editor) > Save
9. Run the Append geoprocessing tool with your file geodatabase dataset as the input and the feature layer as the target
10. Login to ArcGIS Online and navigate to feature layer to ensure that all editor tracking information from file geodatabase has been preserved
11. Re-enable the option to 'Keep track of who created and last updated features' from the Settings of the feature layer > Save
The editor tracking information from the appended data should now reflect it's original information and any new records will record the appropriate editor tracking information at time of collection.