SUNNYVALE, Calif.--(BUSINESS WIRE)--Mitel, a global leader in business communications, is joining the Mitel User Group (MUG) in celebrating the organization's crossing of the 10,000 global member milestone. "MUG is an important member-driven community created by Mitel solutions users for Mitel solutions users to maximize their user experiences, share invaluable insights, and deliver suggestions back to us at Mitel," said Graham Bevington, chief sales officer at Mitel. "Crossing the 10,000 membe