Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Series A Convertible Participating Perpetual Preferred Stock^{F7,F1,F2,F3,F4,F5,F6,F8,F9,F10}	$18.00	Jul 2, 2018	A	6,828	A	—	—	Common Stock, par value $0.0001 per share	379,334	195,181	D

Explanation of responses

F1This Form 4 is being jointly filed by and on behalf of each of the following persons (each, a "Reporting Person"): (i) Silver Private Holdings I, LLC, a Delaware limited liability company ("Silver Holdings"); (ii) Silver Private Investments, LLC, a Delaware limited liability company ("Silver Parent"); (iii) Siris Partners III, L.P., a Delaware limited partnership ("Siris Fund III"); (iv) Siris Partners III Parallel, L.P., a Delaware limited partnership ("Siris Fund III Parallel"); (v) Siris Partners GP III, L.P., a Delaware limited partnership ("Siris Fund III GP"); (vi) Siris GP HoldCo III, LLC, a Delaware limited liability company ("Siris Fund III GP HoldCo"); (vii) Siris Capital Group III, L.P., a Delaware limited partnership ("Siris Fund III Advisor"); (viii) Siris Capital Group, LLC, a Delaware limited liability company ("Siris Capital Group"); (ix) Siris Advisor HoldCo III, LLC, a Delaware limited liability company ("Siris Fund III Advisor HoldCo");
F10(Continued from footnote 9) Based on 42,171,671 shares of Common Stock represented by the Issuer to be outstanding as of June 5, 2018 in the Issuer's annual report on Form 10-K filed on July 2, 2018, the Conversion Cap is 10,477,107 shares of Common Stock, and the Reporting Persons would not be deemed to beneficially own any shares in excess of such amount.
F2(Continued from Footnote 1) and (x) Siris Advisor HoldCo, LLC, a Delaware limited liability company ("Siris Advisor HoldCo").
F3Silver Holdings is controlled by its sole member, Silver Parent. Silver Parent is controlled by its members, Siris Fund III and Siris Fund III Parallel. Each of Siris Fund III and Siris Fund III Parallel is controlled by its general partner, Siris Fund III GP. Siris Fund III GP is controlled by its general partner, Siris Fund III GP HoldCo. Siris Fund III Advisor serves as investment manager to Siris Fund III and Siris Fund III Parallel pursuant to investment management agreements with each of them. Siris Capital Group shares investment management authority in respect of Siris Fund III and Siris Fund III Parallel pursuant to an agreement between Siris Fund III Advisor and Siris Capital Group. Siris Fund III Advisor is controlled by its general partner, Siris Fund III Advisor HoldCo.
F4(Continued from Footnote 3) Siris Capital Group is controlled by its managing member, Siris Advisor HoldCo. Each of Siris Fund III GP HoldCo, Siris Fund III Advisor HoldCo and Siris Advisor HoldCo is controlled by Frank Baker, Peter Berger and Jeffrey Hendren.
F5The Reporting Persons may be deemed to be members of a "group" for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, and the rules and regulations thereunder (such Act and rules, as amended, the "Exchange Act"), which group may be deemed to share the power to vote or direct the vote, or to dispose or direct the disposition, of the securities reported herein. However, neither the filing of this Form 4 nor any of its contents shall be deemed to constitute an admission by any of the Reporting Persons that it is a member of a "group" for such purposes, for purposes of Section 16 of the Exchange Act or for any other purpose.
F6(Continued from footnote 5) Each of the Reporting Persons expressly disclaims beneficial ownership of securities held by any other person or entity other than, to the extent of any pecuniary interest therein, the various accounts under such Reporting Person's management and control. Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person. As permitted by Rule 16a-1(a)(4), the filing of this Form 4 shall not be construed as an admission that any of the Reporting Persons are beneficial owners of any of the securities covered by this statement.
F7On July 2, 2018, pursuant to the Certificate of Designations of Series A Preferred Stock, dated as of February 15, 2018 (the "Certificate of Designations"), of Synchronoss Technologies, Inc. (the "Issuer"), the Issuer issued to Silver Holdings 6,828 shares of Series A Convertible Participating Perpetual Preferred Stock (the "Series A Preferred Stock") as a payment-in-kind dividend for the period beginning on April 1, 2018 and ending on June 30, 2018 on the Series A Preferred Stock acquired by Silver Holdings pursuant to that certain Securities Purchase Agreement, dated as of October 17, 2017 (the "PIPE Purchase Agreement"), between the Issuer and Silver Holdings.
F8Each share of Series A Preferred Stock may be converted on any date, from time to time, at the option of the holder thereof, and has no expiration date.
F9The number of shares of Common Stock reported herein represents the number of shares of Common Stock that would be issuable upon conversion of the 6,828 shares of Series A Preferred Stock received by Silver Holdings as a payment-in-kind dividend, reported herein, without giving effect to the Conversion Cap (as defined in the Certificate of Designations). Pursuant to the Certificate of Designations, the Capped Holders (as defined in the Certificate of Designations) cannot convert any shares of Siris A Preferred Stock that would result in the Capped Holders beneficially owning shares of Common Stock in excess of the Conversion Cap, and the Reporting Persons would not be deemed to beneficially own any shares in excess of such amount.

Remarks

For purposes of Section 16 of the Exchange Act, the Reporting Persons may be deemed to be directors by deputization by virtue of their right to appoint directors to the board of directors of the Issuer. As a result, the "Director" box is marked in Item 5 of this Form 4.