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