Microsoft Dynamics NAV technical support sometimes gets involved regarding request for E-mail logging assistance after an Exchange Server was migrated from old to new hardware or when the original Exchange Server was upgraded to a later release. Starting in Exchange 2007, the underlying OS should be 64-bit which means that new hardware needs to be purchased and the question then comes up how to migrate the old Exchange Server database to the new one. Some customer decide to use tools like Exmerge (PST migration method) or a similar approach.