Variable: org-agenda-skip-unavailable-files
org-agenda-skip-unavailable-files is a customizable variable defined
in org.el.gz.
Value
nil
Documentation
Non-nil means to just skip non-reachable files in org-agenda-files(var)/org-agenda-files(fun).
A nil value means to remove them, after a query, from the list.
Source Code
;; Defined in /usr/src/emacs/lisp/org/org.el.gz
(defcustom org-agenda-skip-unavailable-files nil
"Non-nil means to just skip non-reachable files in `org-agenda-files'.
A nil value means to remove them, after a query, from the list."
:group 'org-agenda
:type 'boolean)