Mickaël Guessant

@esabol is correct, you do *not* need an Oracle licensed JDK to run DavMail, there are many free options available. On Windows I recommend Azul JRE FX from; https://www.azul.com/downloads/?version=java-21-lts&os=windows&architecture=x86-64-bit&package=jre-fx#zulu In...

Look for the "Find client certificates issued by" message in DavMail logs, client certificates are filtered in issuer requested by server. Relevant code is in DavMailX509KeyManager

no private keys found means no alias matched criteria. You may want to enable ssl logging with: -Djavax.net.debug=ssl or -Djavax.net.debug=keymanager

Phone checks means you have MFA enabled, I would strongly suggest you add Microsoft Authenticator as an authentication factor on your account, SMS by phone is not secure enough. Then...

Can you please check davmail.log for more details on the error ? Not sure if it's a failed request or malformed event

That's a lot of changes, need to investigate and learn more recent stuff around systemd

@pkoning2 your mail client is trying to connect in SSL mode on a clear text listener => either force your client to disable SSL (if DavMail runs locally this should...

On the application side, DavMail by default uses a clientId registered by me, you can replace it by a custom clientId registered on your O365 tenant (beware EWS may no...

If you are on windows please have a look at the WebView2 based authentication script at https://github.com/mguessan/o365psauth This script is based on Microsoft provided WebView2 browser implementation, the one used...

If your company enforces device level authentication there is no way to authenticate on a non registered device. What happens if you access: https://login.microsoftonline.com/common/oauth2/authorize?client_id=d3590ed6-52b3-4102-aeff-aad2292ab01c&response_type=code&redirect_uri=urn%3Aietf%3Awg%3Aoauth%3A2.0%3Aoob&response_mode=query&resource=https%3A%2F%2Foutlook.office365.com on a company provided laptop?