to clarify the behavior of the "Merge by selection or all results', the result of clicking this button will not merge the rules in all cases listed. Instead the behavior is intended to be used as an option to choose to merge all of the matched results on a case by case basis.
The alternative to using the 'Merge by selection of all results' is to first click on the case, which will display the results - matched security policies that can be merged, is to manually choose the security policies to merge then click on the 'Merge by selection of all results' button.
So the workflow is you must first select the case then choose to merge all of select only those policies that should be merged.
From a safe practice recommendation, the matches of which security policies to be merged should be reviewed prior to choosing to merge them.
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