- You log on to Windows by using your account from Forest A.
- You use Microsoft Outlook 2010 to connect to your mailbox on a Microsoft Exchange Server 2010 server that's in Forest B.
- Outlook 2010 uses your Windows credentials.
- You open a mailbox profile in Outlook 2010 by using credentials that differ from the credentials that you used to log on to Windows.
- You try to open the Out of Office Assistant in Outlook 2010.
Registry key informationAfter you apply the hotfix package, follow these steps to enable the hotfix:
- Exit Outlook.
- Start Registry Editor.In Windows 8 and Windows 8.1
Swipe in from the right side to open the charms, tap or click Search, and then type regedit.exe in the search box. Or, type regedit.exe at the Start screen, and then tap or click regedit in the search results.
In Windows Vista and Windows 7
Click Start, type regedit in the Start Search box, and then press Enter. If you are prompted for an administrator password or for confirmation, type the password, or click Allow.
In Windows XP
Click Start, click Run, type regedit, and then click OK.
- Locate and then click the following registry subkey: HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Security
- On the Edit menu, point to New, and then click DWORD (32-bit) Value.
- Type WinhttpAuth, and then press ENTER.
- In the Details pane, right-click WinhttpAuth, and then click Modify.
- In the Value data box, type 2, and then click OK.
- Exit Registry Editor.
|0 (or missing)||Default Outlook behavior. The issue that is described in the "Symptoms" section may still occur.|
|1||Sets the Winhttp class calls to a high level. This instructs Winhttp to use the credentials that you used to log on to the mailbox in Outlook instead of the credentials that you used to log on to Windows.|
|2||Sets the Autodiscover class calls to a high level. You can use this value to change security contexts.|
|3||Sets both class calls to a high level.|