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Co-existing Exchange 2003 and 2010

I get this message on Exchange 2003 application events when I try to send a messages from 2010 user, " Failed to create a new named property for database....." for one of my databases." The current quota is 8192. I inceased the quota to 16000, still getting this messages. The user on 2010 gets a messages failed to send recipient address not found,

Has anyone had this issue?

Thanks
Dave

AshwinRaj111

I guess you followed the following article.

http://support.microsoft.com/default.aspx?kbid=820379

After making the registry change hope you restarted the Information Store Service for the settings to take effect.

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ASKER

Hello AshwinRaj111:

Thanks for your respond, I did try that solution and no luck.

But what I can tell you..I can send emails from OWA (on Exchange 2010) to users on Exchange 2003. But can not send them emails from Outlook (application) from Exchange 2010 to Exchange 2003. A user on Exchange 2010 can send to users on 2010 with Outlook.

Any help would be appreciated.

Thanks
Dave

AshwinRaj111

What about Exchange 2003 Users. Are they able to send emails to each other.
Also are they able to send emails to Exchange 2010 users using Outlook and OWA.

What about Outlook in Online Mode. For a Exchange 2010 user in Online Mode try sending an email to Exchange 2003.
See if that works.

Also try moving a Exchange 2010 user to another Database and see if the user from Outlook is able to send emails.

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But changing the the three Reg files to 16000, this fixed the issues.