Hi, we have a problem with our Polycom CX600 devices regarding firmware upgrades.
Currently, with the devices on 4.0.7577.4100 (CU6)everything is working fine.
However, if we upgrade the firmware to either CU7 or CU8, we have an issue where only the first user will be able to sign in on the phone. From that point on, no other user will be able to sign in unless a reset is performed on the phone. Even then, only the first user will once again be able to sign in.
All devices are tethered to PCs.
I recall reading a similar issue months ago, where someone mentioned that this was a known issue. However a further CU has been released since that time so I suspect there is something else at play here.
Kind regards
Ben