Last week we purchased a compatible expansion module to go with our Mitel phones, did some troubleshooting to set it up for one user myself, since the RingCentral guides were not very helpful, and were not specific enough to actually get the set up done. Took a few hours, but finally came across the (very obvious) "expansion module" dropdown under phone system > phone & devices > user phones > user. Simply changed the number from 0 to 1, had to unplug and replug the phone, and start adding the expansion module contacts from line number 45+. Worked great, the employee was happy. So happy, he requested 3 more for his other office locations.

By the time the other 3 expansion modules were delivered, there was some sort of firmware update, that no longer allowed us to select different numbers in the dropdown. The phone that already has the module set up, cannot change the number of modules, and we cannot add to the other devices (for anyone in the company). We only know there was a firmware update because someone in the office noticed their phone randomly rebooted mid-day. we didnt receive any notifications from RC or Mitel. The rep I spoke to also (after 2 hours) checked and said there was some sort of security update last week, and this is why it is not possible to change the number of modules anymore. I don't see the correlation there, and don't understand why they would take away a feature??

Anyway, 5 hours on tech support lines later, and this is still not resolved. Anyone have any experience here? This change must have just happened in the last week.