Hi kitz
I could be wrong sorry but that does not sound right sorry
An audit should not bring systems off line and versions running/installed are listed in respective folders, so at very least, a quick look at folders should reveal versions. Usually a SSH root command would reveal versions of all software (such as php -v etc)
It sounds to me more that they will move you onto a different server (migration) and retire old server (usually an in grade update of apache - full version lite is different I believe) requires a higher version of distro (on centos 6 apache 2.2 not 2.4, 2,4 requires centos 7) so distro from 6 to 7 is not advised). I appreciate your on CPanel which may have upgrade capabilities
Sorry if I am wrong
Many thanks
John