On Tue, 2014-07-29 at 14:17 +0200, Patrick Ohly wrote: Hi, in Exchange Web Services (EWS) protocol (I know it's not the same as ActiveSync, but they seem quite close to each other), one has two options. One is to impersonate the user, which is done with ExchangeImpersonation element [1] in request SOAP message's header part, but it's not the same as shared folders, which are handled in a very different way (the impersonation requires admin settings on the server, if i recall correctly). There is no way to get to shared folders, I guess it's for to security reasons, but users can add shared folders if they know them - those are share notifications emails for. That is easy for standard folders (distinguished folder names, like 'calendar' [2]), but it can work for any folder, supposing the user knows the folder ID. This may need testing with ActiveSync, and an ability to add "custom" folders with SyncEvolution, but maybe it'll work in a similar way as in EWS. (I mean, apart of list of folders reported by the server you might have an ability to let users add shared folders. These may be from Public Folders as well.) Hope it helps, Milan [1] https://git.gnome.org/browse/evolution-ews/tree/src/server/e-ews-message.... [2] https://git.gnome.org/browse/evolution-ews/tree/src/configuration/e-ews-s...