Project Server Bulk Edit add-in enables the quick updating of project fields directly from PWA. Bulk Edit is designed from the ground up to take advantage of the features of SharePoint and Project Server 2013, 2016 and Project Online for fast performance and easy edits of hundreds of projects at once.
Once installed from the SharePoint App Store, the Bulk Edit icon becomes available on the Project Centre ribbon menu under Apps.
Bulk Edit supports updating of all project level Enterprise Custom Fields for all projects that you can access.
Note on On-Premises Installation
The Bulk Edit app fully supports on-premises Project Server 2013 and Project Server 2016 deployments, in order to install the app you may need to request from your SharePoint Administrator to install the SharePoint App Management Service, and / or request that this app be approved for installation by your administrator.
For more information and support see the Nearbaseline app support site.