Cannot access user's calendar or send mail to new mailboxes in Exchange 2010 from migrated mailboxes

Posted on 2011-10-18
Last Modified: 2012-05-12
I just migrated  users from a Exchange 2003 environment to a Exchange 2010 SP1 server. All went well except that I had two mailboxes that couldn't be migrated because of message corruptions. I exported the mailboxes to a pst file and then deleted the old mailboxes. I then created them on the new 2010 server, reconfigured the clients and imported the content without issue.

Now I have a unique problem, some users on the older desktops cannot access the shared calendars for those new mailboxes nor can they send email to those 2 new mailboxes. Yet everyone on our new RDS server environment has no issues with either. Any ideas?

Here are the errors we are getting:
1. When emailing this person from the older systems "The e-mail address you entered couldn't be found. Please check the recipient's e-mail address and try to resend the message. If the problem continues, please contact your helpdesk."
2. When trying to access the shared calendar from the older clients I get the image below. Calendar error
Question by:safeharbor
    LVL 12

    Expert Comment

    by:Deepu Chowdary
    check whether outlook is running in cached mode.

    Author Comment

    No difference. It seems like the new 2010 mailbox has different properties than the migrated 2003 mailboxes

    Accepted Solution

    The solution that solved this issue was to delete the old exchange settings on the desktops and create a new exchange account. Once this was done, everything worked.

    Author Closing Comment

    We were able to internally troubleshoot the issue.

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