Difference Between MSP and PPM Integration Save Icons

Document ID : KB000121635
Last Modified Date : 30/11/2018
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After installing the MSP Interface, a CA PPM Integration ribbon is added to the menu items in Microsoft Project. What is the difference between the Save icon on this ribbon and the Save Icon above the File tab (or on the File menu)? 
Save Icons
The Save icon on CA PPM Integration ribbon will save changes made to a project in MSP back to PPM. 

The smaller Save icon above the File tab will save changes, but only to the local copy of the project. By default, the local copy of the project is saved under My Documents on the workstation. Clicking on File and selecting the Save option will also save project changes locally.