OnePlan allows for tracking more data than what is stored in Office 365 (for example, high level resource planning info) and therefore does store some data. This data is also stored in Azure (Cosmos DB).
The OnePlan applications do not collect or retain any personal information regarding users of the solution. Our customers may elect to store some information in OnePlan about resources, such as skill sets, department names, etc., used when searching for resources to staff projects.
This information remains under the control of the customer, is not accessible by OnePlan staff, and is easily removed by the customer administrative staff when required.
Also, any personal data you choose to store in OnePlan will be stored in Azure Cosmos DB. Cosmos DB is GDPR (as well as many other certifications) compliant
For more information, review the OnePlan Privacy Statement.