Forum Discussion
Microsoft Project Service Core Jan 2026 Update locked Plans table
We recently noted the Microsoft Project Service Core was updated to 1.0.161.1772:
This update has locked our Plans table, no changes are allowed to the forms and creating new columns is greyed out:
We cannot make use of Planner in our model driven app (Planner Premium, non-default environment). After a new Plan is created, the user receives this message when opening the Plan:
Two days ago we were in this version 1.0.160.2874):
and everything was working as expected.
Any guidance would be much appreciated as we are not sure if this is a permanent lock or once the update cycle is completed we will be able to go back to edit Plan forms and columns.
Thank you in advance
11 Replies
Another update in our US Early Release environment (1.0.163.579):
This version continues blocking the msdyn_project table to create columns and modify forms. No changes.
I had an email from Howard Crow regarding this issue, all he said was "The change takes time to roll out FWIW"
There was no indication on timeframes for a fix or any acknowledgement his team understand the impacts this is having on enterprise customers.Pretty disappointing, but not unexpected I guess.
We would like to add our voice to emphasize the critical urgency of this issue. We are in the midst of a large‑scale organizational deployment and must continuously adjust the solution as part of our rollout. Losing the ability to modify the Plan table is effectively bringing our implementation to a standstill and preventing us from meeting our deliverables.
This situation requires immediate attention, and the change urgently needs to be reverted.
Our US Early Release Cycle environment has been updated to version 1.0.162.956:
Unfortunately, this update does not resolve the issue with the Plan table (msdyn_project), which remains locked for customization. 👎
I sure hope Microsoft will eventually publish some article acknowledging this bug and the impact it has had on customers and partners. Meanwhile, I wrote my thoughts about this incident here: The kill switch in Microsoft Planner
We are experiencing the same issue. We customized the Planner Accelerator Model-Driven application and added custom fields to the project table. This is a major problem
We have also noticed this across multiple customer environments, and it is causing major issues. This change needs to be reverted immediately. We can't have the ability to create custom fields and views removed overnight from the system.
AlexanderLahuerta could you please comment on this. The 22 january 2026 is really blocking any development on the Project-app related to Planner Premium.
We’re experiencing the same issue and are very curious to know what the solution is.
We’ve rolled this out to several customers, and now nothing can be modified in this table anymore, which is a major problem.
Same problem here at several customers! The msdyn_project / ,sdyn_plan table is the heart of the complete solution. Making this a managed table is a disater for any update or change to the solution. Microsoft needs to roll-back the update which makes the plan/project table managed.
