Microsoft+Office+has+identified+a+potential+security+concern

Method 1: Manually update the links
To manually update the links in the workbook, follow these steps:
 * 1) With the workbook open, click the **Data** tab.
 * 2) In the **Connections** group, click **Edit Links**.
 * 3) Click the link that you want to update, and then click **Update Values**.
 * 4) Click **Close** to close the **Edit Links** dialog box.

Method 2: Set the links to update automatically
If you receive the security warning message that is mentioned in the "Symptoms" section, follow these steps:
 * 1) In the security warning message, click **Options**.
 * 2) Click **Enable this content**, and then click **OK**.

Method 3: Change the startup prompt for the workbook
To change the startup prompt for the workbook, follow these steps: ===Method 4: Enable the automatic update for data connections or workbook links in the Trust Center === To enable the automatic update for data connections or workbook links in the **External Content ** section of the Trust Center, follow these steps:
 * 1) <span style="background-color: #ffffff; color: #333333; font-family: 'Segoe UI',Arial,Verdana,Tahoma,sans-serif;">With the workbook open, click the **Data** tab.
 * 2) <span style="background-color: #ffffff; color: #333333; font-family: 'Segoe UI',Arial,Verdana,Tahoma,sans-serif;">In the **Connections** group, click **Edit Links**.
 * 3) <span style="background-color: #ffffff; color: #333333; font-family: 'Segoe UI',Arial,Verdana,Tahoma,sans-serif;">Click **Startup Prompt**.
 * 4) <span style="background-color: #ffffff; color: #333333; font-family: 'Segoe UI',Arial,Verdana,Tahoma,sans-serif;">Click **Let users choose to display the alert or not**, and then click **OK**.
 * 5) <span style="background-color: #ffffff; color: #333333; font-family: 'Segoe UI',Arial,Verdana,Tahoma,sans-serif;">Click **Close** to close the **Edit Links** dialog box.
 * 1) <span style="background-color: #ffffff; color: #333333; font-family: 'Segoe UI',Arial,Verdana,Tahoma,sans-serif;">Click the **Microsoft Office Button**, and then click **Excel Options**.
 * 2) <span style="background-color: #ffffff; color: #333333; font-family: 'Segoe UI',Arial,Verdana,Tahoma,sans-serif;">Click **Trust Center**.
 * 3) <span style="background-color: #ffffff; color: #333333; font-family: 'Segoe UI',Arial,Verdana,Tahoma,sans-serif;">Click **Trust Center Settings**.
 * 4) <span style="background-color: #ffffff; color: #333333; font-family: 'Segoe UI',Arial,Verdana,Tahoma,sans-serif;">Click **External Content**.
 * 5) <span style="background-color: #ffffff; color: #333333; font-family: 'Segoe UI',Arial,Verdana,Tahoma,sans-serif;">Click to select the following options, as appropriate for your situation:
 * **Prompt user about Data Connections**
 * **Prompt user on automatic update for Workbook Links**


 * 1) <span style="background-color: #ffffff; color: #333333; font-family: 'Segoe UI',Arial,Verdana,Tahoma,sans-serif;">Click **OK** to close the **Trust Center** dialog box.
 * 2) <span style="background-color: #ffffff; color: #333333; font-family: 'Segoe UI',Arial,Verdana,Tahoma,sans-serif;">Click **OK** to close the **Excel Options** dialog box.

<span style="background-color: #ffffff; color: #333333; font-family: 'Segoe UI',Arial,Verdana,Tahoma,sans-serif;">*Note: After fixing this the document may open as just a grey screen in Excel. If so go here for the fix: Excel documents open as blank-grey