This article describes how to troubleshoot the following kinds of issues in Microsoft Office Outlook 2007 or Microsoft Outlook 2010 when Outlook is used with Office 365:
Outlook stops responding (hangs).
Outlook crashes even though you aren't actively using it.
To help troubleshoot Outlook issues in an Office 365 environment, follow these steps.
Outlook 2010
Step 1: Investigate possible issues with add-ins
Do one of the following:
If you're running Windows XP, click Start, and then click Run.
If you're running Windows Vista or Windows 7, click Start.
Type Outlook /safe, and then click OK.
If the issue is fixed, on the File menu, click Options, and then click Add-Ins.
Select COM Add-ins, and then click Go.
Click to clear all the check boxes in the list, and then click OK.
Restart Outlook. If the issue doesn't occur, start adding the add-ins one at a time until the issue occurs.
Step 2: Run Outlook Diagnostics
Open Control Panel, and then open Add or Remove Programs (if you're running Windows XP) or Programs and Features (if you're running Windows Vista or Windows 7).
In the list of installed programs, right-click Microsoft Office 2010, and then click Repair.
Step 3: Create a new user profile
Open Control Panel, and then click the Mail item.
Click Show Profiles.
Select the profile that you want to remove, and then click Remove.
Click Add.
In the Profile Name box, type a name for the profile.
Specify the user name, the primary SMTP address, and the password. Then, click Next.
You may receive the following message:
Allow this website to configure alias@domain server settings?
In this message, click to select the Don't ask me about this website again check box, and then click Allow.
When you're prompted, enter your logon credentials, and then click OK.
When set up is finished, click Finish.
Outlook 2007
Step 1: Investigate possible issues with add-ins
Do one of the following:
If you're running Windows XP, click Start, and then click Run.
If you're running Windows Vista or Windows 7, click Start.
Type Outlook /safe, and then click OK.
If the issue is resolved, on the Tools menu, click Trust Center, and then click Add-ins.
Select COM Add-ins, and then click Go.
Click to clear all the check boxes in the list, and then click OK.
Restart Outlook. If the issue doesn't occur, start adding the add-ins one at a time until the issue occurs.
Step 2: Run Outlook Diagnostics
Start Outlook 2007.
Click Help, and then click Office Diagnostics.
Click Continue, and then click Run Diagnostics.
If an issue is identified, Office Diagnostics may be able to repair the issue.
Step 3: Create a new user profile
Open Control Panel, and then click the Mail item.
Click Show Profiles.
Select the profile that you want to remove, and then click Remove.
Click Add.
In the Profile Name box, type a name for the profile.
Specify the user name, the primary SMTP address, and a password. Then, click Next.
You may receive the following message:
Allow this website to configure alias>@<domain> server settings?
In this message, click to select the Don't ask me about this website again check box, and then click Allow.
When you're prompted, enter your logon credentials, and then click OK.
When set up is finished, click Finish.
Troubleshoot Outlook profiles by using Microsoft Outlook Configuration Analyzer Tool (OCAT)
You can also use OCAT to troubleshoot Outlook issues. For more info about OCAT, see the following Microsoft Knowledge Base article:
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