javamail access to a shared mailbox

Question

I\'m trying to write an java application that will access a additional, shared mailbox to read emails and perform other activities. I have no problem reading my own

Answer 1

With the help from the other answers, I figured out following solution, that works for com.sun.mail:javax.mail:1.6.2

Properties props = new Properties();
props.setProperty("mail.imaps.auth.mechanisms", "LOGIN");
Session session = Session.getInstance(props);
Store store = session.getStore("imaps");
store.connect("outlook.office365.com", 993, "user@xyz.com\\shared_account_alias", "user_password");

With javax.mail:mail:1.4.7 following code works:

Properties props = new Properties();
props.setProperty("mail.imaps.auth.plain.disable", "true");
Session session = Session.getInstance(props);
Store store = session.getStore("imaps");
store.connect("outlook.office365.com", 993, "user@xyz.com\\shared_account_alias", "user_password");

shared_account_alias is NOT the email address.

Eventually I have found a more standard way of accessing the shared mailbox:

Properties props = new Properties();
props.setProperty("mail.imaps.sasl.enable", "true");
props.setProperty("mail.imaps.sasl.authorizationid", "shared_account_alias");
Session session = Session.getInstance(props);
Store store = session.getStore("imaps");
store.connect("outlook.office365.com", 993, "user@xyz.com", "user_password");