The check_stbuehler_exchange_version script has to modes:
check(default)pages
Icinga/nagios compatible plugin to check exchange server version.
Currently looks for the X-OWA-Version header in the response for http[s]://server/AutoDiscover/AutoDiscover.xml.
Create machine (and human) readable list of exchange versions with an heuristic flag whether they are good to use.
Versions are parsed from https://docs.microsoft.com/en-us/exchange/new-features/build-numbers-and-release-dates.
Supported CU versions are parsed from https://learn.microsoft.com/en-us/exchange/plan-and-deploy/supportability-matrix.