No, that should be fine for 62.5/125 fiber as far as I can recall. I cannot particularly remember there being an "A", but the part number EM1G-SX is very familiar.
If it doesn't link, you may want to flip the fiber around on the LIU/FIU which is often ST or SC. Sometimes folks get receive to receive and transmit to transmit instead of transmit to receive and receive to transmit.
Other than that, you can do a "show media" or "show media e 1/3/1" or whatever the port number is the device is using.
Another great couple commands are "show run int e 1/3/1"
"show int e 1/3/1"
Hope that helps, but it should be fairly straight-forward, which surely means it will take all day, where when you have something complicated to resolve it will end up just working.