you for reaching out to the Community regarding your issue, although I am sorry
to hear that you are experiencing issues with PenFed CU. Does this issue happen while trying to update your accounts? This only started yesterday here as well so it's a very recent error. Did the bank make any changes to their website in recent times as well? If you haven't already I would recommend taking a look at the 503 error article down below.
you get a chance to look over the steps let us know how it goes and also some of the additonal details asked.
The "PenFed does not support automatic downloads to Quicken" comment given to scott.e made me look at the PenFed web site. Their FAQ could be read to support that statement; however, that same quicken-help FAQ also says, "On some newer computers with Microsoft Money installed". Since Microsoft discontinued that product 12 years ago I don't think I'm going to trust anything they say about Quicken.