No issue here, only a return of experience.

After having some complains and issues with MailWise (sync issues, battery issue, and problem to update contact informations), I've discovered Nine which can sync any Exchange server with Mail, Calendar, Contact, Tasks even Notes.
I'm using it intensively and it works very well. It's battery friendly and has a lot on interesting features.
The only flaw is that it do not support POP or IMAP.

I've no personal interest with that company. I just want to let you know that I've found the perfect solution for me.

I would also like to have feedback from Zextras tech team perspective. How does it perform for you ?

Best regards