According to the documentation of the microsoft graph v1.0 api it is possible to convert a pptm file to a pdf file. See When I call the API a get a 406 - not supported response (InputFormatNotSupported). This happens with the sdk and via a basic rest call. For example:
let pdf = await client.api('/me/drive/items/{item-id}/content?format=pdf').get();
let response = await fetch('https://graph.microsoft.com/v1.0/me/drive/items/{item-id}/content?format=pdf');
I have seen that in the new beta version pptm is not supported any more. Hope it will be still supported because this is a typical use case for me. Does anybody can help? Thanks so much.