Outlook for IOS problems

I have big problems to use that APP.

I know that I have to discuss about Outlook for IOS through the support in the APP.

I have problems with sync messages.

I have already writed them from the November, 5 and I have received some answers like:

this APP doen't support more than 1 Exchange account in the same tenant.

I have 4 email account to check in mobility. I have deleted two account from the APP, but the problems persist.

That's not a good situation. 

I have to suggest in my tenant to delete Outlook from their mobile devices and use another APP...

Is it possible???

Using Apple Mail no problem, using Outolook no sync !!!