Hello Martin, I'm working here in my company also with a Exchange 2010 server via IMAP/SMTP and have no trouble at all with Icedove from Jessie.
On Tue, Dec 08, 2015 at 02:48:17PM +0100, W. Martin Borgert wrote: > When starting icedove, I get the following, unexpected dialog: > > Microsoft Exchange EWS: Password request. > > Enter password for mydomain\myusername on > https://mymailserver/ews/exchange.asmx > > ____ > > [ ] Use Password Manager to remember this password. > > [ Cancel ] [ OK ] > > When I enter my supposed password and click on OK, > the dialog appears again. > > When I click on Cancel instead, the program continues, > but sending email via SMTP to the MS server fails, > probably because of the missing password. Can you please enable some logging as explained on https://wiki.debian.org/Icedove#Debugging_Icedove_Activity an investigate probably errors? But something like "EWS" looks like Calendar Exchange Provider? Or do I miss something? But as you use version 38.4.0-1~deb8u1 there is no Debian package for this in backports. https://packages.debian.org/sid/mail/calendar-exchange-provider There is also a hint for iceowl-extension on not remebered passwords, maybe this is issue? https://wiki.debian.org/Icedove#Iceowl-extension_does_not_remember_credentials Regards Carsten