Check if you can reduce the retention period on %DPMServerName; such that the recovery point volume size is less than %MaxDPMShadowCopyVolSize; ...

1) Check if you can reduce the retention period on %DPMServerName; such that the recovery point volume size is less than  %MaxDPMShadowCopyVolSize; TB.
2) Reduce the number of data sources that you are protecting on %DPMServerName;.
3) Consider adding a DPM server to protect the additional data sources.