Awards Ceremony Recognizes More Than 100 Partners for
      Business Performance, Technical Expertise and Customer
                           Satisfaction

OTTAWA, Ontario, June 26, 2012 (GLOBE NEWSWIRE) -- Mitel(R)
(Nasdaq:MITL), a leading provider of unified communications and
Collaboration (UCC) software solutions, announced its 2012 Channel
Award winners at the company's annual Americas Business Partner
Conference last week in San Diego, California. Mitel authorizedPARTNERS
were recognized for achievements in a range of categories that focused
on leadership in application sales growth, customer satisfaction, and
technical expertise in selling, installing and supporting today's
advanced UC solutions.

Winners in the category of overall Business Partner excellence in the
Americas included Windstream Communications in the U.S., Allstream in
Canada, and Telmex in the Caribbean and Latin America regions. In
addition, the UK's BT won the global award for carrierPARTNER of the
year. These partners earned top honors for outstanding results in
revenue and growth, application sales, customer service and quality,
marketing efforts, and technical expertise.

Mitel also recognized a number of channel partners who invested in a
higher level of solution training, competencies and certification in
Virtualized Voice, Mobility, Contact Center and Unified Communications.

"Over the past year, we have focused on aligning our channel partners
with our geographic expansion and the re-vectoring of our product
portfolio to leverage our leadership in virtualization," said Rich
McBee, CEO and president of Mitel. "This year's winners exemplify the
expertise, behaviors, and customer care qualities that reinforce their
status as trusted advisors to our growing list of customers. We are
incredibly proud of what has been achieved in this past year."

The Business Partner awards recognize performance during Mitel's
financial year, which runs May 1, 2011 to April 30, 2012. To find out
more about the awards and read a full list of winners, please visit:
http://mitelbpc.com/overview/awards-gala/

About Mitel

Mitel (Nasdaq:MITL) is a global provider of business communications and
collaboration software and services. Mitel's Freedom architecture
provides the flexibility and simplicity organizations need to support
today's dynamic work environment. Through a single cloud-ready software
stream, Mitel delivers a powerful suite of advanced communications and
collaboration capabilities that provides freedom from walled garden
architectures and enables organizations to implement best-of-breed
solutions on any network; extends the "in-office" experience anywhere,
on any device; and offers choice of commercial options to fit business
needs. For more information, visit: http://www.mitel.com

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CONTACT: Amy MacLeod (media)
         613-592-2122 x71245
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         Malcolm Brown (industry analysts)
         613-592-2122 x71246
         malcolm_brown@mitel.com
         
         Cynthia Hiponia (investor relations)
         613-592-2122 x71992
         investorrelations@mitel.com