Problem to connect to WLAN after upgrade to iOS 11

[franz_josef_gec]

We are running a ZD 1100 with 9.10.2 Build 29 firmware and 7762 and 7363 APs.
After upgrading iOS devices from 10.x to 11 these devices cannot connect to the WLAN.
We are using pre shared Keys and WPA2.
Even if we try to use the guest WLAN a connection ist not possible.
What can we do resolve this issue?

[stefan_gruenbec]

Thanks for reply, we got new ZoneFlex R310 AP's and installed new firmware 10.0.1.0.17 on ZD 1200. Now, we have perfect connection to iOS11.  The last FW 9.12.0.0.336 for the old 7962 AP's did not work.

[spider_solitair]

The user get to know how do i fix bluetooth audio devices connections in windows 10 >the best tutorial is available here.