2011 - 2020
In 2011, Mitel launched litigation against at least two Australian businesses for infringing on Mitel's trademark and the businesses for engaging in misleading or deceptive conduct under Australian consumer law.[26] The first case against Melbourne telecommunications company MyTel was resolved.[27]
On March 1, 2013, Mitel announced it had completed the sale of its DataNet CommSource business unit ("DataNet") in Sioux Falls to EarthBend, LLC.[28] In December 2016 the company announced that it had sold its mobility unit for $385 million to Xura and that would focus its business on Unified Communications.[29]
In June 2013, Mitel announced the completion of acquisition of one of its key suppliers, prairieFyre Software Inc., a privately held global provider of contact center, business analytics, and workforce optimization software and services. The net cash cost to Mitel for the acquisition of prairieFyre was approximately $20 million. prairieFyre was an original equipment manufacturer (OEM) that supplied Mitel with its existing contact center solution.[30]
In November 2013, Mitel announced the purchase of Aastra Technologies.[31]
On March 4, 2014, Mitel announced the acquisition of contact center supplier OAISYS.
In March 2015, Mitel announced to buy Mavenir Systems for $560 million.[32]
In April 2016, Mitel announced its intention to buy Polycom for $1.96 billion.[33] The deal was intended to give existing Polycom shareholders both cash and new Mitel shares for their holdings and result in Polycom shareholders owning 60% of the combined company. The acquisition was ended in favour of a merger with Siris Capital instead,[34] forcing Polycom to pay a US$60 million fee to Mitel for cancelling the deal.[35]
In July 2017, Mitel announced they had reached a deal to buy ShoreTel for $530 million, increasing the size of the company to approximately 4,200 employees.[36][37][38]
Major League Baseball, in 2018, entered into a deal with Mitel to unify communications "between the press box, dugout, bullpen and video review rooms at every MLB ballpark from the Rogers Centre to Wrigley Field".[39]
On November 30, 2018, Mitel announced that all the shares of Mitel were acquired by affiliates of funds advised by Searchlight Capital Partners. The shares ceased trading on the TSX and Nasdaq[40] and were delisted.
In April 2019, Mitel moved to merge with Avaya.[41] The merger did not go through.[42]
In October 2019, Mitel’s CEO Richard McBee resigned.[43] Mary McDowell became the new CEO.[44]