[Q] Exchange Service 6.1 ????????

Hi all, I recently upgraded My Xperia Z3 to Lollipop and I noticed that in GMAIL I can not enter my exchange account. I noticed that services exchange are still at version 6.1, while in my tablet - for example - they are the new version 6.5 (and in fact I have my work account). I tried to download the apk and install it but I can not get mail. Maybe am I wrong steps? I must first uninstall the 6.1 then install the 6.5? or it updates itself? or for now they are incompatible with xperia?

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