You can easilly load your own SSL certificates via the UI form:
If you have your company certificate only in PKCS#12 format, you must unwrap it to certificate / key parts.
Use any host with openssl to do this (my_cert.p12 is source certificate in these examples):

# output full chain of trusted certificates
openssl pkcs12 -in my_cert.p12 -nokeys -out xormon.crt

# export unencrypted private key
openssl pkcs12 -in my_cert.p12 -nocerts -nodes -out xormon.key

You'll be asked for the password used on PKCS#12 creation
Then you can use exported PEM files xormon.crt and xormon.key in Xormon UI