The string in your question is in Base64 (I have replaced certain parts of the string with (withheld) for anonymity):
CN=(Withheld).CARMELA.(Withheld),OU=NonCNIC,OU=Active,OU=iShore,OU=Hosted Applications,DC=(Withheld),DC=(Withheld)
Are you using ldifde? If so, I believe the default mode for exporting files is ANSI. If there are Unicode entries (maybe this one), they will be converted into base-64 format by default. If you want to export a file into Unicode format, try using the -u switch.
Be aware that if you want to import, and you have unicode entries, but your file is not in a proper unicode format, you may need to also specify the -u switch. Be careful when importing. Measure twice, cut once.