Task ID is by default not a mandatory field for tasks. There are many (1000+) tasks which have blank/null Task IDs (prexternalid). Is there a way to update the task ids for these tasks having blank task Ids?
If you are using either MSP or OWB, you could user below workaround. We would recommend to do it in OWB if possible over MSP.
A workaround to have those task ID's populated manually in Microsoft Project and save them back to PPM can be done with the following:
XOG is not an option to update as it would create another Task as opposed to updating an existing one.
We don't support doing direct database updates because it may cause adverse scenarios.