Support SMTP OAUTH authentication for 365
- Support SMTP OAUTH authentication for 365. Basic support is not available.
- details https://mailservices.docs.cern.ch/ExchangeOnline/programmatic/
- code sample https://gitlab.cern.ch/mail/mailservices-code-samples
- will need a persistent storage to store the token for refesh
- needs to be discussed for first call (interactive browser required)