I went to configure 3CX auto attendant to Exchange Online /Office 365 UM and it doesn't work. Then support tells me it's not supported. I see that these companies support it. Aastra Alcatel Avaya Cisco Inter-Tel Intecom Mitel NEC NeXspan Nortel Panasonic Rolm ShoreTel Siemens Sonus Tadiran Toshiba Why don't 3CX support Office 365 UM? How hard can it be? I have probably lost a sale because of this.