Hi, I have seen a similar issue with one of my users now and I tried to search the web but I couldn't find any answer or pointers.
But I get an Exception as below:
*Exception
Exception type: System.ArgumentException
Exception message: Bundle: Microsoft.Transformation.UT_LCDR could not be found (Search Paths: C:\Program Files\Microsoft\Exchange Server\V15\Bin\Search\Ceres\Native)
Call stack
Microsoft.Exchange.Data.Search.Common.DictionaryPackageManager.Get(String bundleIdFullName)
Microsoft.Exchange.Data.Search.Common.DictionaryPackageManager.TryGetValue(String key, IPackage& value)
Microsoft.Exchange.Data.Search.Common.DictionaryPackageManager.d__25.MoveNext()
System.Linq.Enumerable.FirstOrDefaultTSource
Microsoft.Ceres.NlpBase.DictionaryInterface.Resource.NlpResourceManager.GetResource(AssemblyName bundleId)*
and it goes on...