What is the maximum lifetime of a completed task?
[Note: As we migrate from MSDN, this question has been posted by an Azure Cloud Engineer as a frequently asked question.]
By default, the data for completed tasks (the files on the node) will be kept for 7 days. Refer this document on limits.
However, the actual task itself does not have maximum lifetime limit. It could exist in the system for years, although it is recommended to periodically delete tasks.
Source : Azure Documentation FAQ Link
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