Can One Mu'adhin call out the Adhaan in Two Masjids?

Q: Salaah-221: We have two Masjids and two Mu'adhins, but when one of them gets off for fifteen days, the other Mu'adhin calls out the Adhaan in his own Masjid and then at the other Masjid as well. Some people are complaining about this. Are their complaints justified?

Answer: Yes. It is Makrooh for one Mu'adhin to call out the Adhaan at two Masjids. Someone else will have to appointed to call out the Adhaana. And Allaah knows best what is most correct.

Fatawa Rahimiyyah vol.2