That's good for a start. I am assuming that you are going to keep trying to get the cow to take the calf... As long as no one else gets on her, the colostrum will still be there for this calf. IDEALLY they say 2 to 4 QTS within 12-24 hours... because they cannot absorb much of the the anti bodies after 24 hours.
I have some different thoughts on that...
Colostrum is good NOT ONLY for the antibodies... the thicker nature of it most of the time also helps to get the meconium to pass from the calf.... it like "primes" the gut tract... and I have a different thought on the absorption rate... but it is nothing that has been proven...
As long as the calf gets to suck on the cow, it will get the overall benefits of the colostrum. If you have any doubts... get a bag of the colostrum SUPPLEMENT.... not near as expensive as the actual colostrum replacer... but it will help boost what the calf already got.
I save colostrum from a cow that I can milk, mostly my dairy cows, and freeze it.... I will give a qt of colostrum to every single calf I bring home to foster on a cow... UP TO A WEEK old.... innoculating them with antibodies that are on my farm..... JUST MY way of doing things...
Wipe down/soak the cow's nose in vanilla extract and then put it on the calf... butt and nose.... so it smells "right" to her... the imitation vanilla extract is good enough... won't hurt her to lick it... we have used cheap perfume in the past too... as long as you can get her in the chute and make the calf go on her, and the milk goes through the calf so it's manure "smells right" to the cow, she ought to take it pretty quick... I would not let her out with the other cow and baby she was trying to take for awhile....
Had one that did the same a few years back... just had to put them separate places.... sometimes their hormones get out of whack, and they just don't "get it" right.