[Iscool]

but my understanding is that those who practice that do not believe that any grace is communicated through baptism, rather that it is a public affirmation following a conversion experience. (If I’m wrong, I’m wrong out of ignorance, not out of maliciousness, so please correct me)

That's close enough...

My question is for those Protestants who believe baptism to be a sacrament (vice an ordinance): do you accept the validity of a baptism performed by a group that believe it’s an ordinance (and not a sacrament)?

Water baptism is not a requirement...We (the group that I run with) do not accept nor deny any baptism...That's between the believer and God...

While some churches require baptism before becoming a member of their church, others don't...

I support the idea of baptism before church membership since that shows the rest of the church that you have chosen to trust Jesus Christ as your Savior...

If your baptism is based on that premise, a baptism from anywhere is good...Otherwise, you need to get re-dunked...

[Tao Yin]

My question is for those Protestants who believe baptism to be a sacrament (vice an ordinance): do you accept the validity of a baptism performed by a group that believe it’s an ordinance (and not a sacrament)?

We acknowledge one baptism for the remission of sin. A baptism is water and the word. If there is water and the word, there is a baptism. There is no need to re-baptize, as if the first one didn't take.