A comment transforms.conf suggest using host matching to remap sourcetype, but that changes the sourcetypes of all events emitted from that host. So, suddenly your plain-vanilla Window sourcetypes disappear.
Instead, I've used the [(?::){0}sophos:*] trick in props.conf to get those CIM-compatible search-time aliases and lookups to fire.
My current problem with them is that they don't exactly match the output from Reporting Log Writer anymore. When I get the field mappings working again, I'll report back here.
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