[SOLVED] T46G not forwarding

[Service Computer Team_Support]

Hey,

we recently set up an environment of a bintec elmeg beIP+ and several Yealink T46G.
We tried to configure Forwarding via the menu on the phone and web interface. But none of it seem to work. Everytime we called, the phone rang, with forward active or inactive.
Forwarding via Code number in the beIP+ works fine, but doesnt provide any visible feedback on the phone.
Strangely, the phone in our company works fine concerning forwards and I can't find any differences in configuration (except account ofc), firmware, etc.

Can anyone help? Do you need more details?

Thanks in advance,
Nils