sharepoint2013以前版本，有更换账户功能，到了sharepoint2013，则隐藏了这个功能，有时候我们在测试机上调试东西，需要切换账户，就变得非常麻烦，但问题总是有解决的方法，下面将介绍在2013上如何恢复切帐户功能

1. 首先找到文件路径：C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\15\TEMPLATE\CONTROLTEMPLATES
2. 用记事本编辑器打开Welcome.ascx 文件，其中有颜色部分是需要加入其中的代码段。

   <%@ Register Tagprefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls" Assembly="Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> <%@ Register Tagprefix="Utilities" Namespace="Microsoft.SharePoint.Utilities" Assembly="Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> <%@ Import Namespace="Microsoft.SharePoint" %> <%@ Assembly Name="Microsoft.Web.CommandUI, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>

   <%@ Control Language="C#" Inherits="Microsoft.SharePoint.WebControls.Welcome,Microsoft.SharePoint,Version=15.0.0.0,Culture=neutral,PublicKeyToken=71e9bce111e9429c"   AutoEventWireup="false" compilationMode="Always" %>

     <SharePoint:PersonalActions accesskey="<%$Resources:wss,personalactions_menu_ak15%>" ToolTip="<%$Resources:wss,open_menu%>" runat="server" id="ExplicitLogout" MenuAlignment="Right" Visible="false">

   <CustomTemplate>

   <SharePoint:FeatureMenuTemplate runat="server"

   FeatureScope="Site"

   Location="Microsoft.SharePoint.StandardMenu"

   GroupId="PersonalActions"

   id="ID_PersonalActionMenu"

   UseShortId="true"

   >

   <SharePoint:MenuItemTemplate runat="server" id="ID_PersonalInformation"

   Text="<%$Resources:wss,personalactions_personalinformation%>"

   Description="<%$Resources:wss,personalactions_personalinformationdescription%>"

   MenuGroupId="100"

   Sequence="100"

   ImageUrl="/_layouts/15/images/menuprofile.gif?rev=23"

   UseShortId="true"

   />

   <SharePoint:MenuItemTemplate runat="server" id="ID_RequestAccess"

   Text="<%$Resources:wss,personalactions_requestaccess%>"

   Description="<%$Resources:wss,personalactions_requestaccessdescription%>"

   MenuGroupId="100"

   UseShortId="true"

   Sequence="300"

   />

   <SharePoint:MenuItemTemplate runat="server" id="ID_Logout"

   Text="<%$Resources:wss,personalactions_logout%>"

   Description="<%$Resources:wss,personalactions_logoutdescription%>"

   MenuGroupId="100"

   Sequence="400"

   UseShortId="true"

   />

   <SharePoint:MenuItemTemplate runat="server" id="ID_PersonalizePage"

   Text="<%$Resources:wss,personalactions_personalizepage%>"

   Description="<%$Resources:wss,personalactions_personalizepagedescription%>"

   ImageUrl="/_layouts/15/images/menupersonalize.gif?rev=23"

   ClientOnClickScript="javascript:ChangeLayoutMode(true);"

   PermissionsString="AddDelPrivateWebParts,UpdatePersonalWebParts"

   PermissionMode="Any"

   MenuGroupId="200"

   Sequence="100"

   UseShortId="true"

   />

   <SharePoint:MenuItemTemplate runat="server" id="ID_SwitchView"

   MenuGroupId="200"

   Sequence="200"

   UseShortId="true"

   />

   <SharePoint:MenuItemTemplate runat="server" id="MSOMenu_RestoreDefaults"

   Text="<%$Resources:wss,personalactions_restorepagedefaults%>"

   Description="<%$Resources:wss,personalactions_restorepagedefaultsdescription%>"

   ClientOnClickNavigateUrl="javascript:SP.SOD.execute('browserScript', 'MSOWebPartPage_RestorePageDefault')"

   MenuGroupId="200"

   Sequence="300"

   UseShortId="true"

   />

     <SharePoint:MenuItemTemplate  runat="server" ID="ID_LoginAsDifferentUser"

                                    Text="<%$Resources:wss,personalactions_loginasdifferentuser%>"

                                    Description="<%$Resources:wss,personalactions_loginasdifferentuserdescription%>"

                                    MenuGroupId="100"

                                    Sequence="100"

                                    UseShortId="true"/>

   </SharePoint:FeatureMenuTemplate>

   </CustomTemplate>

   </SharePoint:PersonalActions>

   <SharePoint:ApplicationPageLink runat="server" id="ExplicitLogin"

   ApplicationPageFileName="Authenticate.aspx" AppendCurrentPageUrl=true

   Text="<%$Resources:wss,login_pagetitle%>" style="display:none" Visible="false" />

    

   编辑完后保存，即可注销上方出现“其他用户身份登录”。