You may found the following warring in Site Status -> SMS Management Point
MP has discarded a report when processing Ddr
Possible Cause: Corruption or invalid user definition.
Solution: Check the logs to identify the cause. if the problem is persistent
raise the issue with Microsoft Support.
The error”MP has discarded a report when processing Ddr”, It’s happening because the “old” clients are trying to send inventory/discovery data to the new MP.
This may occur if you have old SMS or SCCM server and you deploy a new SCCM server.
So the problem should be the “old” clients are trying to send inventory/discovery data to the new MP.
To solve this issue, please try the following steps:
1- Log on to DC with admin account.
2- Open ADUC.
3- Click view-advanced future.
4- Highlight “system management” container underneath domain.com-system.
5- Check if there is item with name “SMS-MP-site Code-machinename”, just delete the record with discarded MP machine name.
6- Restart the site server and MP.
For any question related to Configuration Manager, please post your question to the following forum: