Mickaël Guessant

Thanks for your feedback... would need a way to trigger this on a test account to implement the missing use case in DavMail. However you used the right approach whenever...

Please first check DavMail configuration by accessing Caldav in a web browser. If your client does not like domain\username syntax, please set default domain in DavMail settings

Which credentials do you use to access https://localhost:1080 ? => you will have to use the same credentials on the client side

Sorry, default config without certificate: http://localhost:1080

Well, this means you can access DavMail. => Next steps: - check authentication directly to Exchange - check authentication through DavMail - check davmail.log for errors. => No need to...

Please try in EWS mode with the following url: https://messagerie.social.gouv.fr/EWS/Exchange.asmx

We are not supposed to have cookies over EWS, however we do see a Cookie rejected message in your log... this may be an issue. Anyway, it would be interesting...

@bepolymathe your browser screenshot contain an OWA authentication, not EWS, which is et /EWS/Exchange.asmx You can then export requests as a har file. Please do not post it publicly and...

Can you please provide a status update on this ?

My guess would be a client configuration issue with sent folder management. It's not message send that fails but a folder search: With DavMail the client does not need to...