RE: Alert 3/27/2021- Bank Of America CC:555/155

I followed up regarding the alert posted about Bank of America maintenance all weekend.
I received the error (CC-555) Saturday (3/27) during the day BOA and found the alert. I was able to download transactions successfully today (3/28). However, I found the credential was missing from the vault. I had to re-establish online services and then all was fine. I called BOA and they confirmed maintenance was done on 3/27, but no further details were provided. During that time, online banking access was not affected. I would not think a failed connection would remove the vault credential.
Any ideas on how the maintenance outage would affect Quicken?
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