Android mail client using Exchange Web Services? I'm looking for an Android e-mail client that connects to a hosted Exchange 2010 server via Exchange Web Services (EWS). I know there are several mail apps (including the stock mail client) that can work with Exchange through ActiveSync and/or WebDAV, but my server supports neither of these.
Here's what I've found:


AquaMail


"Support for standard Internet email protocols: IMAP, POP3, SMTP; Exchange: EWS" (reference)

Blue Mail


"Support for … Exchange (ActiveSync, EWS, 365)"
cloud-involved

Email TypeApp


"Supporting … all Exchange protocols including Exchange Web Services (EWS)"
probably cloud-involved

MailCal for Exchange


"email and calendar client that uses EWS/OWA/Webmail"

MailDroid


various forum postings discuss EWS support

MobiMail


"Exchange Web Services (EWS) is required on the Exchange server"

Newton Mail


"Supports Calendar for Gmail, Google Apps, and Exchange (EWS)"
cloud-involved

Stack Mail, a.k.a. Ginger Mail, a.k.a. Squash Mail


"Please make sure that EWS (Exchange Web Services) is enabled on your Exchange server"
this says Google was refunding purchases



Honorable mention:


AOL Alto - discontinued November 9, 2017