Hi Team, Can some one share with me a doc which can give me more Information on an Upgrade from UCM 7.1 on MCS to UCM 11.x on BE6000

Hi Cisco Collaboration Community,Can someone advice me on the Part no. for Imagicle Billy Blue 4 which can support up to 1000 extensions? 

Hi, I have a client who is looking for an Email Security Solution using Cisco IronPort Appliance. Hi needs redundancy for higher availability. Can someone assist me how will the email traffic traverse from the failed ESA to a standby ESA?