Exhibit 99.1

Signatures of Reporting Persons

This Statement on Form 4 is filed by the Reporting Persons listed below.

July 29, 2020

TRIANGLE PRIVATE HOLDINGS II, LLC


By:	/s/ Peter Berger
Name:	Peter Berger
Title:	Managing Partner

TRIANGLE PRIVATE HOLDINGS I, LLC


By:		/s/ Peter Berger
Name:		Peter Berger
Title:		Managing Partner

TRIANGLE PRIVATE INVESTMENTS, LLC


By:			/s/ Peter Berger
Name:			Peter Berger
Title:			Managing Partner

SIRIS PARTNERS III, L.P.
SIRIS PARTNERS III PARALLEL, L.P.
By:	Siris Partners GP III, L.P., its general partner
By:	Siris GP HoldCo III, LLC, its general partner

By:	/s/ Peter Berger
Name:	Peter Berger
Title:	Managing Member

		SIRIS PARTNERS GP III, L.P.
		By:	Siris GP HoldCo III, LLC, its general partner

		By:	/s/ Peter Berger
		Name:	Peter Berger
		Title:	Managing Member

		SIRIS CAPITAL GROUP III, L.P.
		By:	Siris Group GP, LLC, its general partner

		By:	/s/ Peter Berger
		Name:	Peter Berger
		Title:	Manager

		SIRIS CAPITAL GROUP, LLC
		By:	Siris Group GP, LLC, its managing member

		By:	/s/ Peter Berger
		Name:	Peter Berger
		Title:	Manager

Triangle Private Holdings II, LLC 4