Error on CDO.Message object after Exchange 2007 or 2010 Upgrade
Closed     Case # 10042     Affiliated Job:  BaBaDou DOT Com
Opened:  Tuesday, September 21, 2010     Closed:  Tuesday, September 21, 2010
Total Hit Count:  12247     Last Hit:  Wednesday, July 24, 2024 6:47:16 AM
Unique Hit Count:  4410     Last Unique Hit:  Wednesday, July 24, 2024 6:47:16 AM
Case Type(s):  Development, Server
Case Notes(s):  All cases are posted for review purposes only. Any implementations should be performed at your own risk.

After upgrading to Exchange 2007 or 2010 on the same 64-bit server hosting 32-bit web sites, my asp code requesting the Server.CreateObject("CDO.Message") object began erroring out.

This is because the Exchange server registers the 64-bit CDO object and by simply registering the 32-bit CDO object will resolve this issue:

regsvr32 C:\Windows\SysWOW64\cdosys.dll

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