E-Mail-App for Android with Exchange / Activesync

I need my work emails on my mobile. They only work with Exchange/Activesync. IMAP is not an option. Is there a good, privacy respecting app for Android out there? I would like if I could use the same app for my other E-Mails which all use IMAP. I now use Gmail, but I hate the unnecessary connection with the big G. I'd also prefer not to use Outlook (mobile) because it (might) send your credentials to MS.