I checked now 7 and they are many problems with exchange.
First:
I am unable to add second exchange account.
The first one (mail@…) is working fine, but if I enter a second one (info@…), it is the same like the first one!!! The name account is different, but the content is the same as in the first! All account information are the same like in 6.
If I import from 6, everything seems to be fine!?
Also there is a separate contact (Global Adresslist) for every mail address in the Contacts. So I had two for every mail address. If I import from 6, everything is as ever.
Second:
I had a lot of information in the notice section. If I enter one new character an sync this, everything is a grouped style in Outlook. No blanks!
Third:
Which crazy guy has designed the GUI?
The buttons of Mail, Calendar etc. are so big. Why?
Why hiding the Menu?
Why Windows 10 style? I am not able to see what is in front or in the back. Crazy.
However, these are my first impressions.