Authentidate Holding Corp. Non-executive Chairman F. Ross Johnson Steps Down From...

Authentidate Holding Corp. Non-executive Chairman F. Ross Johnson Steps Down
From Board of Directors

J. Edward Sheridan Appointed Interim Non-executive Chairman of the Board of
Directors

BERKELEY HEIGHTS, N.J., March 2 /PRNewswire-FirstCall/ -- Authentidate Holding
Corp. (Nasdaq: ADAT), a worldwide provider of secure Health Information
Exchange and workflow management services, announced today that F. Ross
Johnson stepped down as non-executive chairman and from the Board of Directors
effective immediately. J. Edward Sheridan has been named non-executive
chairman on an interim basis, also effective immediately.

"Ross Johnson has played a valuable role in Authentidate's development and
strategic vision, since joining our board as a director in 2003. He has
helped the company grow into a worldwide provider of secure Health Information
Exchange and workflow management services. We thank Ross for his leadership
and dedication to Authentidate and wish him well with his future endeavors,"
commented J. Edward Sheridan, on behalf of Authentidate's Board of Directors.

F. Ross Johnson stated, "My resignation is due to my desire not to stand for
re-election to the Board of Directors for the fiscal year 2009. I believe
there are exciting opportunities ahead for Authentidate and I wish the board
of directors, executive team and employees much success in the future."

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(R) Electronic
Postmark(R) (EPM).

For more information, visit the company's website at
http://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.

This press release is available on the KCSA Strategic Communications Web site
at www.kcsa.com.

Investor Contacts: Media Contacts:
Todd Fromer / Garth Russell Erika Kay
KCSA Strategic Communications KCSA Strategic Communications
212-896-1215 / 212-896-1250 212-896-1208
tfromer@kcsa.com / grussell@kcsa.com ekay@kcsa.com

SOURCE Authentidate Holding Corp.

Investor Contacts: Todd Fromer, +1-212-896-1215, tfromer@kcsa.com, or Garth
Russell, +1-212-896-1250, grussell@kcsa.com, both of KCSA Strategic
Communications; Media Contact: Erika Kay, KCSA Strategic Communications,
+1-212-896-1208, ekay@kcsa.com; all for Authentidate Holding Corp.