Home > Exchange 2010, Exchange 2010 AKA E14 > #Exchange Calls to UM or Voice Mail are dropped when the called is withheld

#Exchange Calls to UM or Voice Mail are dropped when the called is withheld


That is an issue with Exchange 2007 and 2010 as well, if the call is withheld then the call is dropped, this is basically because the the call to the Exchange voice mail when the number is withheld unknown the calls comes in the format sip@withheld or sip@unknown thus the call is dropped, there is currently no available official fix for this issue from MS, to workaround this issue you might want to look into your gateway of your PBX to create some sort of call modification rule to convert unknown to some thing like 1unknown or 0withheld just add any number before this text thus the call comes in the format sip@1unknown or sip@1withheld and thus Exchange 2010 accepts it.

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