Exhibit 99.1

Signatures of Reporting Persons

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

August 31, 2020

	TRIANGLE PRIVATE HOLDINGS II, LLC

	By:	/s/ Peter Berger
	Name:	Peter Berger
	Title:	Authorized Signatory

	TRIANGLE PRIVATE HOLDINGS I, LLC

	By:	/s/ Peter Berger
	Name:	Peter Berger
	Title:	Authorized Signatory

	TRIANGLE PRIVATE INVESTMENTS, LLC

	By:	/s/ Peter Berger
	Name:	Peter Berger
	Title:	Authorized Signatory

	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 GP HOLDCO III, LLC

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

SIRIS GROUP GP, LLC

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

Triangle Private Holdings I, LLC 4