資料庫一般都有密碼保護，但地理資料庫沒有。嘗試用ArcGIS打開由Access建立的mdb資料庫也無效。
官方也回答了這個問題
Question
Can I use or set passwords on a personal geodatabase?
Answer
No, while the underlying(潛在的) .mdb file supports the use of passwords, the geodatabase and ArcGIS do not. Microsoft Access .mdb files that are password protected cannot be opened in ArcGIS, nor can password protected personal geodatabases be created in ArcGIS.
If the intention(意圖) is to restrict users from accessing the personal geodatabase, setting the appropriate(适當的) user level permissions on the folder is recommended. For more information on setting different permissions for different users accessing a personal geodatabase, see the following ESRI Knowledge Base article in the Related Information below.
當然了，也不是不能連接配接。但始終是連的MS的mdb，不是真正的個人地理資料庫，存儲圖形操作也就不友善了。
參考：
<a href="http://support.esri.com/em/knowledgebase/techarticles/detail/34871">http://support.esri.com/em/knowledgebase/techarticles/detail/34871</a>
<a href="http://support.esri.com/en/knowledgebase/techarticles/detail/25325">http://support.esri.com/en/knowledgebase/techarticles/detail/25325</a>
<a href="http://help.arcgis.com/zh-CN/Arcgisdesktop/10.0/Help/index.html#//005s00000023000000">http://help.arcgis.com/zh-CN/Arcgisdesktop/10.0/Help/index.html#//005s00000023000000</a>
<a href="http://forums.esri.com/Thread.asp?c=93&f=985&t=207927">http://forums.esri.com/Thread.asp?c=93&f=985&t=207927</a>