Zone-Tzid mapping table

The plugin uses the php /iana / olson timezone db
https://en.wikipedia.org/wiki/Tz_database
it is possible to go 1-1 from the iana tz to windows tz but NOT from windows tz to iana (1 to many).

May I ask what you are doing ?

1) Are you trying to have outlook generate an ics file and loading that to a server and then referencing it in the plugin ?
if so how many timezones do you have ? a quick solution would be to do a search and replace (using eg: notepad) in the ics file before you load it to the server. Because of the 1-many mapping it would not be possible to offer a robust mapping.
https://stackoverflow.com/questions/17348807/how-to-translate-between-windows-and-iana-time-zones

OR
2) are you using amr-events to create the events and trying to subscribe via outlook ? I’ve not heard of problems that side before – outlook must surely handle commonly generated timzones used by most applications (ie the iana tz’s)