Some of the Catholic sacraments - baptism, confirmation, Holy Orders leave a permanent mark on a person's soul that their life thereafter never completely erases. Should anyone undergo an epiphany the Church would not require anyone to undergo any of these sacraments again upon their return to the church.
When did the Catholic church ex-communicate them?"
The process known as excommunication is merely a formal recognition that the excommunicated person themselves has, by their own acts, placed themselves outside the Church, rather than the Church casting anyone out.
In some instances, such as in the case of a person who commits atrocities and crimes against humanity or even procures, aids or counsels an abortion, this excommunication is automatically incurred by the commission of the act (ie; there's no formal pronouncement that you are excommunicated) but the excommunication is in effect nonetheless.
I’ll take that as a *No*.