Affect is when something changes another thing in a good or bad way (e.g Punching someone affects them in a bad way). Effect is either as a result of (the effect of Covid-19 made people have to quarantine) or something is happening (lockdowns are in effect).
That’s confusing, as with your explanation it could be affect or effect. After googling, I found the best way to explain.
Affect - Future Tense - verb
I will affect this by doing that.
If you code it that way, and affect might be…
Effect - Past Tense - noun
COVID effected this.
The effect of the closing was this.
So than it would be “effect”, as it was outage that is effecting the accounts, and the notice is there to tell you that. Thanks @ManuTheCoder for starting this discussion!
It’s more confusing than that, witch is why I use Grammarly.