Get (and use

) the Quality check plugin
Step 0 (one time): Configure the Author initials format you wish to standardize on
Step 1 Check Metadata:Check Author initials: <these failed to conform
Step 2 (select those from step 1) Fix: Authors Initials
You can use step 2 on any selection in the future.

Fix can also do a 'flip' of Fn Ln
This is probably my most used PI overall