We have a ZD1100 running 184.108.40.206 build 8 firmware, managing two ZF7762 outdoor APs. One of ZF7762 AP is the root AP and the other is a mesh AP. We need to add one new T300 outdoor AP to ZD as Mesh AP to extend the coverage. For this tried updating the firmware to 220.127.116.11.99, but after choosing the file from IE 11 browser it shows uploading nothing else. Waited for one hour, but nothing happened and still shows uploading. From other posts came to know that there is an upgrade path to follow for the upgrade and cannot directly jump to 18.104.22.168 from 22.214.171.124. Please help with the upgrade path to follow and the correct version of firmware ZD1100 for all the APs to work (ZF7762 & T300).