I think I'll need a bit more information to narrow this one down. Can you tell me if your iteration name-changes synced correctly? So now when you look in both TeamPulse and TFS, the iterations have the same name? If not, are there Sync Errors within TFS?
If the changes did sync correctly, can you extrapolate on what you mean when you refer to TFS Reports? Are these simply user queries that are keying on a specific iteration name? Or is this something else?
Once we have a bit more detail on the situation we can likely determine how to act on it.
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