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I tried creating a simple rule: In Content protection I chose Application File Access Protection Rule, then I checked Media Burner Application and Windows CD burner, but when I try to Apply the rules, I got the following validation errors:
1) "The rule uses an application definition named 'Windows CD Burner' which is not backward compatible. This option is not supported by old agents."
What is considered an "old" agent? The oldest DLP agent version in our environment (which is only on a handful of PCs) is 220.127.116.112. The vast majority of PCs have version 18.104.22.168.
2) "The rule contains 'Content Categories' or 'Tag Groups' which is not backward compatible. This option is not supported by old agents." Same question as above, but in addition, I cannot deselect the 'tag group' or 'content category' option, because then I get an error that says "The rule definition is not complete. You will not be able to enable this rule. You must select at least one tag."
Screenshot is attached. Our ePO version is 4.6.4.
Any assistance is appreciated!