StreamServe Secures Savings for Customers by Signing a Reseller Agreement for Authentidate's Electronic Signature Solution

StreamServe EU-Invoicing^TM Customers to Migrate from Paper to E-invoicing that Complies with European Union Directives for Digital Signatures

BURLINGTON, MA and BERKELEY HEIGHTS, NJ, USA
March 6, 2007

StreamServe^® Inc., the global leader in Enterprise Document Presentment (EDP), today announced a reseller agreement with Authentidate International AG, a wholly owned subsidiary of worldwide secure enterprise workflow management application provider Authentidate Holding Corp. (Nasdaq: ADAT), to market its EU-Invoicing^TM solution with Authentidate's eBilling Signature Solutions and Services.

The new layer of Authentidate technology in StreamServe's EU-Invoicing solution will eliminate the requirement for organizations to monitor highly variable electronic signature and archive compliance laws for individual EU member states. Without this capability, the savings benefits of e-invoices could be mitigated by unrealized non-compliance, resulting in loss of their buyer's right to reclaim Value Added Tax (VAT) as well as exposure to administrative fines.

"Forrester Research projects that e-invoicing reduces operational costs by up to 80 percent (€5 to €1)," said Chris Stone, president and CEO of StreamServe. "It is because of this cost savings that projections have indicated more than 200,000 companies will become customers of e-invoicing applications and services in 2007, presenting a significant opportunity for StreamServe and Authentidate." 

Authentidate International AG is accredited by the German Federal Network Agency (BNetzA) in accordance with the German Digital Signature Act and related European directives.  Authentidate Deutschland GmbH, a wholly owned subsidiary of Authentidate International AG, provides signature-based business process solutions that are easy-to-integrate, provide high economic efficiency, are platform-independent and comply with the legal regulations of the respective business process for which the solution is designed.

Joint StreamServe and Authentidate customers can not only easily switch from paper-based invoices to electronic channels, but StreamServe's unique marketing capabilities allow customers to maximize e-invoicing savings by consistently and appropriately promoting the benefits of e-invoicing on paper invoices to their end customers, resulting in substantially greater adoption rates and associated savings. Organizations can freely choose the formats in which they would like to sign and send invoices (e.g. such as PDF, TIFF, IDoc, ASCII, XML, etc.), leveraging the same business process used for paper invoices.

"Our synergistic partnership with StreamServe will allow businesses to reduce costs related to print production and postal expense by delivering e-invoices with the appropriate digital signature for the recipient," said Jan C. E. Wendenburg, CEO of Authentidate International AG.

About StreamServe Inc.

StreamServe Enterprise Document Presentment^TM (EDP) software enables the world's leading companies to communicate effectively with their customers, partners and suppliers through the automated creation and presentment of documents in any format and channel. StreamServe's EDP solutions enable more than 4,500 customers in 130 countries to present a full range of interactive, electronic and print-based documents generated by enterprise applications. Customers include leading global companies such as Bayer, BMW, CLP Power Hong Kong, Circuit City and DaimlerChrysler Bank. StreamServe is headquartered in Burlington, Mass., and has 15 offices worldwide. For additional information, please visit http://www.streamserve.com/.

About Authentidate International AG

Authentidate International AG in Düsseldorf, Germany, develops and provides independent business-process solutions enabling customers to simply and quickly integrate digital signatures and time stamps into existing corporate processes. The unique set of solutions can be used for almost any business process (i.e. billing, workflow, archiving, scanning and e-mail communication) to significantly reduce costs and optimize processing immediately.

Many high-profile companies in various industries and governmental organizations have used Authentidate's digital signature solutions for years in Germany, Europe and other countries to substitute paper processing with legally binding, electronic business processes in accordance with international and local legal environments. 

For the first time, professional signature solutions are available either as boxed products, web services or individual solutions, based on a common, flexible and modular architecture. The elements of the unique offering, available from Authentidate may be used independently or in combination with other solutions. Today, many software vendors have already integrated Authentidate's signature products into their standard offerings. Therefore any organization now may easily benefit from automatic digital signatures processing.

In addition, Authentidate offers governmentally certified trust center services in accordance with the German Signature Act and the EU Signature Directive. Authentidate International AG was accredited by the German Federal Network Agency (Regulatory Agency for Telecommunications and Postal Affairs) in November of 2001 and operates a trust center especially for time stamp services. 

About Authentidate Holding Corp.

Authentidate Holding Corp. is a worldwide provider of secure enterprise workflow management applications that incorporate its proprietary and patent pending content authentication technology in the form of the United States Postal Service® Electronic Postmark® and electronic signing solutions. Authentidate also provides secure document management solutions, and enterprise network security products and services. 

The company operates its software and services businesses in three segments: the Security Software Solutions segment (including Authentidate, Inc., Trac Medical Solutions, Inc. and Authentidate International AG), the Document Management Solutions segment (Docstar Division) and the Systems Integration segment (DJS). For more information, visit the company's website at http://www.authentidate.com/.

StreamServe®, the StreamServe logo, StreamServe EDP, StreamServe Persuasion^TM and "How Does Your Company Present Itself?" are all trademarks of StreamServe Inc. Some software products marketed by StreamServe Inc. and its distributors contain proprietary software components of other software vendors. Authentidate® is a trademark of Authentidate Holding Corp.  All other marks are trademarks or registered trademarks of their respective holders. ©StreamServe Inc. 2006.

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.