How do I troubleshoot performance issues in Outlook?
The following guide from Microsoft describes how to troubleshoot performance issues in Outlook:
Microsoft explains that Outlook performance issues may be caused by one or more of the following:
- Insufficient computer specifications
- Absence of the latest service pack and updates for Outlook
- Large Personal Folders files (.pst) or Offline Folder files (.ost)
- Outlook .ost files or .pst files that are stored on a drive with insufficient write performance
- Third-party add-ins
- Your AppData folder is redirected to a network location
- Gadgets that access Outlook data (Windows Vista only)
- Microsoft Office Communicator integration
- Antivirus software interaction
- Windows Search or Windows Desktop Search indexing
- Incomplete closure of .pst files or .ost files
- POP3 accounts on Windows Vista clients
- Many Really Simple Syndication (RSS) feeds
- To-Do Bar and Online mode with Exchange server
- Damaged Outlook messaging profile
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