We are using an SAP solution shipped before 2007 let’s say R/3 Enterprise 4.7. Does the customer letter mean that we have to upgrade all servers to 64-bit in 2007?
No.You can continue to use your 32-bit servers for older SAP releases as long as the releases are in maintenance by SAP. See http://service.sap.com/maintenanceextension (SMP Login required) for general information on SAP maintenance policy. As a general rule: SAP Systems using an SAP kernel with release 6.40 or lower are not affected by the 32-Bit de-support.