Authentidate Holding Corp. to Report Fiscal  2010 First Quarter Results on Monday, November 16, 2009

BERKELEY HEIGHTS, N.J.
November 13, 2009

Authentidate Holding Corp. (Nasdaq: ADAT), a worldwide provider of secure Health Information Exchange and workflow management services, today announced that it plans to report financial results for the fiscal 2010 first quarter ended September 30, 2009 on Monday, November 16, 2009, after the close of market trading.

Management will host a conference call on Monday, November 16, 2009, at 4:30 p.m. ET, to discuss the latest corporate developments and results. The dial-in number for callers in the U.S. is (888) 562-3356 and the dial in number for international callers is (973) 582-2700.  The access code for all callers is 39604866. To access the live webcast, visit www.authentidate.com, click the "About Us" link, followed by "Investor Relations" on the drop-down menu and then the "IR Events & Presentations" link. Following the conclusion of the call, the webcast will remain on the company's website for review within the fiscal year.

A dial-in replay of the call will be available through November 23, 2009. To access the replay, please dial (800) 642-1687 in the U.S. and (706) 645-9291 internationally, and then enter the access code 39604866.

About Authentidate Holding Corp.
Authentidate Holding Corp. is a worldwide provider of secure Health Information Exchange and workflow management services.  The company's software and web-based services enable healthcare organizations and other enterprises to increase revenues, improve productivity and reduce costs by eliminating paper and manual work steps from clinical, administrative and other processes and enhancing compliance with regulatory requirements. The web-based services are delivered as Software as a Service (SaaS) to customers. These solutions incorporate rules-based electronic forms, intelligent routing, transaction management, electronic signatures, identity credentialing, content authentication, and automated audit trails. Both web and fax based communications are integrated into automated and trusted workflow solutions.  The company has offices in the United States and Germany. In the United States, Authentidate offers its patent pending content authentication technology in the form of the United States Postal Service® Electronic Postmark® (USPS EPM®).

For more information, visit the company's website at www.authentidate.com.

This press release contains forward-looking statements within the meaning of section 27A of the Securities Act of 1933 and section 21E of the Securities Act of 1934. When used in this release, the words "believe," "anticipate," "think," "intend," "plan," "will be," "expect," and similar expressions identify such forward-looking statements. Such statements regarding future events and/or the future financial performance of the company are subject to certain risks and uncertainties, which could cause actual events or the actual future results of the company to differ materially from any forward-looking statement. Such risks and uncertainties include, among other things, the availability of any needed financing, the company's ability to implement its business plan for various applications of its technologies, related decisions by the USPS, the impact of competition, the management of growth, and the other risks and uncertainties that may be detailed from time to time in the company's reports filed with the Securities and Exchange Commission. In light of the significant risks and uncertainties inherent in the forward-looking statements included herein, the inclusion of such statements should not be regarded as a representation by the company or any other person that the objectives and plans of the company will be achieved.

Authentidate is a registered trademark of Authentidate Holding Corp.
Inscrybe is a trademark of Authentidate Holding Corp. All other trade names are the property of their respective owners.