参考类似问题解决的方法
https://social.technet.microsoft.com/Forums/exchange/en-US/188831ba-fefb-42d4-952e-a89e65deae94/attachments-missing-in-outlook-2010-but-show-in-web-app
1. Make
sure Outlook is closed.
2. Open
your registry editor by opening the Run command and type regedit (regedt32
for Windows 2000).
In Windows Vista and Windows 7 you can also directly type regedit in
the Start Menu’s Search box.
3. Locate
the following key
§ Outlook
2000
[HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Outlook\Security]
§ Outlook
2002
[HKEY_CURRENT_USER\Software\Microsoft\Office\10.0\Outlook\Security]
§ Outlook
2003
[HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\Security]
§ Outlook
2007
[HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Security]
§ Outlook
2010
[HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Security]
4. Go
to Edit-> New-> String Value and name the value Level1Remove (case
sensitive!)
5. Double-click
on the newly created value and enter the extension including the "dot" that you want to open in Outlook. For instance .exe
If you need to enter more than one extension you'll have to type separate them by a semicolon like this;.exe;.bat;.url
6. Press
OK on the input box and close the registry editor
7. When
you open now Outlook, the attachments which hold those extensions aren't blocked by Outlook anymore.
To let Outlook block those extensions again follow the instructions
again but instead of creating the Level1Remove value delete it.
当然也考虑移动着几个用户邮箱到其他数据库中，查看是否是用户邮箱有问题。
Exchange 2010 SP1服务器,Outlook中看不到有附件,但是OWA中能却看到附件
