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Project Server and Project Online Interfaces

OnePager supports multiple interfaces that connect to Project Online and Project Server. The interface that OnePager uses will depend on the version of Project Online or Project Server that you are using. In newer versions, you will have a choice of several interfaces.

IMPORTANT: The information contained in this article only applies to Project Server and Project Online. It does NOT apply to desktop Microsoft Project. Desktop Microsoft Project, often known as Project Professional, exclusively uses the COM interface, which OnePager supports for Project 2003 and later.

Supported Project Server/Project Online Interfaces

Server Version

COM

CSOM

PSI

PDS

Project Online

Yes

Yes

N/A

N/A

Project Server Subscription Edition

Yes

Yes

N/A

N/A

Project Server 2019

Yes

Yes

N/A

N/A

Project Server 2016

Yes

Yes

N/A

N/A

Project Server 2013

Yes

Yes

Yes - Deprecated

N/A

Project Server 2010

Yes

N/A

Yes - Deprecated

N/A

Project Server 2007

Yes

N/A

Yes - Deprecated

N/A

Project Server 2003

Yes

N/A

N/A

No

COM Interface

COM stands for Component Object Model, and is Microsoft's longstanding interface for transmission of Microsoft Project data to external applications such as OnePager. OnePager maintains access to the COM interface through Microsoft Project Professional for all versions of Project Server and Project Online

CSOM Interface

CSOM stands for Client Side Object Model and is the third-generation interface that Microsoft introduced beginning with Project Server 2016. OnePager fully supports CSOM for this and later versions of Project Server and Project Online, and maintains a live test environment to facilitate customer support.

PSI Interface

PSI stood for Project Server Interface, and was the second-generation interface that connected to Project Server 2007-2013. Microsoft withdrew support for PSI in 2016. OnePager continues to support PSI connections as a deprecated interface, but no longer makes updates to the interface, nor maintains its own test environment to facilitate customer support. OnePager customers using Project Server 2007-2013 can continue to use PSI as a deprecated interface. If support from OnePager is needed, temporary VPN access to the customer's Project Server environment may be required. Project Server 2007-2013 customers may also choose to utilize the COM interface instead of PSI, as it remains fully-supported.

PDS Interface

PDS stood for Project Data Service, and was the original legacy interface that connected to Project Server 2003. Microsoft withdrew support for PDS in 2007, and OnePager has never supported it. OnePager users who still have Project Server 2003 can leverage COM instead of PDS.


Last Updated: April 19, 2022