Exchange not syncing but says connected.

We have one user who is not getting mail regularly.  His Outlook says connected to exchange but no mail comes in.  He gets mail from his other POP accounts but nothing though exchange.  What i have to do is go to the exchange send and receive tabs, and choose send and receive for the exchange inbox.

DNS is right, IP is good, no other issues, any suggestions?
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Try checking the send and recieve groups to make sure everything is correct there.  You can follow the document below to create a new group to see if the old group has something wrong.
What happens when the user sends mail to himself?
level9techAuthor Commented:
He does not get it.  I have to manually sync outlook.  

have reinstalled outlook.
Ran all updates.
Set up whole new outlook profile.
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Is it working with the new profile?
level9techAuthor Commented:
nope it did for a second.  he added 6 additional mailboxes would this effect it?  When i open outlook it syncs then says to the left of "connected to microsoft exchange" last updated at 2:23.
Are you using Cache Mode?  If you are try turning it off.
level9techAuthor Commented:
that did the trick for now i will continue to monitor it.  but wont this effect performance?
Turning Cached mode off just proves that there is something wrong with the OST and that is causing the problem.  Most likely there is a corrupt email in there.  Move the old OST to a different location and turn Cached mode back up and let it recreate the OST.  If it still doesn't work then it's a bad email and depending on how big the mail box is it could be fun trying to find it.

level9techAuthor Commented:
after hours on the phone with microsoft we decided to rebuild the os.  

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