Unable to rename extensions

Hello,

I recently became responsible for an Asterix/FreePBX phone system, which I didn’t configure and have no documentation on unfortunately.

I have managed OK with things, however I can’t seem to rename extensions. I have tried to rename them using FreePBX, updating the linked users. There is no reference at all to the old display names, but it still appears on the Yealink T23G handsets when dialling.

Is anybody able to help please?

You are on the wrong forum. You want https://community.freepbx.org/

My apologies! Thank you for the link.

Display name can be set on caller endpoint (softphone, ip phone, … ) .

If you checked your FreePBX / Asterisk setting, you should also check setting in endpoint.