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Outlook (in Exchange 2003 environment) Not Receiving E-Mails but Blackberry is Getting EMails

I have a user that reported that he's getting his emails in his blackberry but when he looks to his Outlook in his laptop, he doesn't see or get the same emails he sees on his blackberry. We are in Exchange 2003 and we are using Verizon Blackberry 7250 v4.0.0.204 (Platform

Also, he tried to forward the emails he received in his blackberry to his Outlook and the blackberry would not allow it.

I looked into the Exchange System Manager and I looked in his Mailbox. His mailbox name (UserA) has a different "Last Logged on by" name. It's not UserA but UserB or UserC and it keeps changing.  Could this be a problem to? How do I troubleshoot or fix this?

I need help ASAP.

Thanking in advance.
2 Solutions

Looks like he has some delagates (he gave other users permissions to his mailbox), it looks like the other users are deleting these mails. Let the user login to the domain and check his delegates in the Tools menu and then options. Also, check AD Users & Computers to see if someone has permissions on his mailbox (thought it was the Exchange general tab, open AD USers & Computers  on the Exchange machine, else you won't have these tabs...)

Other [possibility might be that his mailbox is in cached mode, then he wil have to tab the Send?Receive button to get his mail..
Does the blackberry have an option to delete downloaded emails?
karlmacAuthor Commented:
Thanks for answering rhandels.

I thought the problem was delagates permission but I had him look at his delagates and he had none.

How do I check AD Users & Computers to see if someone has permissions on his mailbox?? How do I check to see if his mailbox is in cached mode? If it is, how do I change it?
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The mailbox isn't in cached mode, Outlook is. Normally, when you start Outlook, in the system tray (next to the clock right side down) is the Outlook icon. If the server is in cached mode, you will see it here.. (or go into Outlook, choose Tools, then e-mail accounts, make sure "view or change existing..." is selected and click next. There, you will see the settings for this mailsetup. Click change and in the first screen, there will be an option that says "Use exchange in cached mode".

In AD Users & COmputers, go to the specified user, right click, click properties and then go to the (my guess is, no server here right know) Exchange General tab. Then go to permissions to see if another user has permissions here..
GO to ADUC and then specified user and then right Click properties...Exchange Advanced ...Mailbox Rights....Check the other user name who has permission on that mailbox.

For Cached Mode You go to Client Machine and check the properites of Outlook by reconfiguring the same profile it will show you that if it is in cached mode.

One more thing i want to clear you that if user has given access to someone on his calendar then it may reflect in exchnage sytem manager as last logon by.

To add some info to that, even your backup user has to logon to the mailbox (if you use brick layer backup). So this could also be a backup account (at least one of them.. ;))

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