How to troubleshoot Outlook 2010 problems with messages that cannot be synchronized

Problem Description: Recently received a number of company colleagues reported that Outlook could not receive the mail, the whole morning a message did not come in, has been showing updates, but the lower right corner of the connection status is normal (see figure I below); Then, the user logs into the mailbox via webmail, It is normal to see a new mail in the inside;

Figure I:

Problem analysis: From Microsoft's official staff to know, if the mailbox inside a folder of the number of messages into the 5000+, it will be selected to be unable to sync the message, you can open the Outlook diagnostic mode, according to the log to determine the number of messages per folder mailbox:

1, open Outlook 2010, and then click "File"-"Options"

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2, find "advanced"-"other", the "Enable troubleshooting log" in front of the check

3, restart "Outlook 2010"

4, press "WIN" key + "R" open the running window, enter "%temp%", carriage return

5, find "Olkdisc.log", this is a log file