How do I resolve issues with emails not being delivered to folders in Exchange?

1. First, establish if the issue is related to a particular folder or if all folders are affected.
2. Check for the presence of any rules that may be directing emails to particular folders.
3. If rules are present, modify the rule properties to determine if this resolves the problem.
4. If the issue is with a particular folder, is it visible to Outlook? If not, recreate the folder and move the existing emails into the new folder.
5. Check the size of the personal folder, if it has grown too large the issue could be related to the Personal Folder exceeding the maximum size limit.
6. If the issue persists, check the Inbox Repair Tool for any problems with the folder.
7. Finally, if the issue still persists, consider the Folder Properties and the messages in the folder.