I had a customer forward a couple phones on an ECS with a VMI off site. When answered by the operator and being transferred to the ext., forwarding off site works fine. When calling into their auto attendant, get a fast busy. No restrictions are set on the VMI channels, they're just like all the stations. I do have remote access to the PBX but not the VMI. Would the mailbox 900 setting 'Block calls during day mode' and night mode cause this under the Forward/Blocking tab? If not - I wonder if there's a trunk to trunk setting in the VMI or ECS?