Optional system index changes associated with a previous upgrade are still pending. This is because the forest-wide dSHeuristics ...

Optional system index changes associated with a previous upgrade are still pending. This is because the forest-wide
dSHeuristics flag fDisableAutoIndexingOnSchemaUpdate is set. This flag, when set, disables automatic indexing of optional system indices.


To ensure optimal performance from this AD DC, force an index creation. If fDisableAutoIndexingOnSchemaUpdate is set
to 1, perform a rootDSE attribute modification on schemaUpdateNow and set it to 1. If fDisableAutoIndexingOnSchemaUpdate is
instead set to 2, perform a rootDSE attribute modification on schemaUpdateIndicesNow and set it to 1. This behavior can also
be turned off by resetting the fDisableAutoIndexingOnSchemaUpdate flag in dsHeuristics to 0; AD DCs will
automatically rebuild indices as they receive this change.