To resolve this issue, install one of the following cumulative updates, as appropriate for the telephone that you use:
- May 2015 cumulative update for Microsoft Lync Phone Edition for Aastra 6721ip and Aastra 6725ip telephones
- May 2015 cumulativeupdatefor Microsoft Lync Phone Edition for HP 4110 and HP 4120
- May 2015 cumulative update for Microsoft Lync Phone Edition for PolycomCX500, Polycom CX600 and Polycom CX3000 telephones
- May 2015 cumulative update for Microsoft Lync Phone Edition for Polycom CX700 and LG-Nortel IP Phone 8540