New install - MICS 7.0 with CallPilot 150 3.0 DN's start at 1160 (to match PRI DID's). CallPilot will not allow me to create mailbox 1171 (prompts with "invalid mailbox") through web interface or f983. All others work I have plenty of licensing for additional mailboxes. 9 is used for PRI routing 6 is being used for pool A. I have created a different numbered mailbox for the ext in question, but am baffeled why I cant create 1171. Has anybody else had this problem?