hobscons wrote:

I have archived old tasks through "File, archive" and I see the .pst
file in Explorer but how do I now view the archived files in Outlook?

FileOpenOutlook Data File. Browse to the archive PST, select it, and
clicck OK.

Is it now safe to delete them from the tasks view since they've been
archived?

Archiving usually deletes it from the original folder. If you still see it
there, then it probably wasn't archived.
--
Brian Tillman