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Are you asking if there is a timelimit for EUM snapshots?
If so, then yes I think it's 90 days or something like that. If you're On-Prem you should be able to edit it, the exact fields are in this document: https://docs.appdynamics.com/display/PRO45/Configure+the+EUM+Server
If I'm understanding your question then no I think it's universal since it's a setting on the Controller. If you're using the SAAS Controller, you may need to request AppD to edit the snapshot expiration time for you, I'm not sure, I'm On-Prem.