If I remember correctly it?s the Display Name of the organization that causes the problem, so in Exchange 5.5 Administrator, click on the Organization Object and then go to File > Properties and change the Display Name for the Organization object and then try to install Exchange 2000 again. Hope this helps Mark Fugatt MCT, MCSE, Microsoft Exchange MVP Pentech Office Solutions Inc Tel: 585 586 3890 Cell: 585 576 4750 Fax: 585 249 0316 www.4mcts.com www.exchangetrainer.com -----Original Message----- From: Darwin O. Solano [mailto:dar.solano@xxxxxxxxxxxxxx] Sent: Sunday, June 15, 2003 12:34 AM To: [ExchangeList] Hi all? Last Saturday I began an Upgrade from Exchange 5.5 to Exchange 2K for a client. The server were up to Sp3 on W2K and SP4 on Exchange, everything was running smooth until I insert the Exchange 2K CD for the upgrade. The thing was that the upgrade can not be done because the name of the organization contains invalid characters; the character was an ?&? in the middle of the name. The message told me that I have to change the name of the organization thru the Admin console for Exchange 5.5. I have tried everything to do it, but without success. Can anyone point me in the correct direction to solve my upgrade.? Thanks Darwin O. Solano Gerente de Ventas y Nuevos Productos Tel: (809)372-0033 Cel: (809)299-1214 Fax: (809)372-0033 (Favor de llamar antes) eFax : (509) 694-1018 (From US and Other countries only) eMail: soltec@xxxxxxxxxxxxxx <mailto:soltec@xxxxxxxxxxxxxx> dar.solano@xxxxxxxxxxxxxx <mailto:dar.solano@xxxxxxxxxxxxxx> F5 Network <http://www.f5.com/> , Best on Internet Traffic. ECORA <http://www.ecora.com/> , Best on Network Auditing tools. PANDA AV <http://www.pandasoftware.es/> , Best on Virus Detection in the World?. Tenemos materiales de oficina: Toner, Tintas, papel de Fax, etc. Llámenos y pregunte?..