Certain pages or windows don't appear in Outlook Web App or Exchange Admin Center when you use Google Chrome

When you use Google Chrome to access Microsoft Outlook Web App or the Exchange Admin Center, you can't perform certain actions because certain pages or windows don't appear as expected.

For example, you're an admin, and you want to change a custom attribute for a mailbox. You open the properties of the user, and then you click�Edit () under Custom attributes. However, the page that lists the custom attributes doesn't appear.

The web browser doesn't support the showModalDialog API.

Important Follow the steps in this section carefully. Serious problems might occur if you modify the registry incorrectly. Before you modify it, back up the registry for restoration in case problems occur.

Update the policy settings for the browser. To do this, follow these steps.

1. Click Start, type regedit in the Start search box, and then click regedit.exe.
2. Locate and then click the following registry subkey:
   HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome\EnableDeprecatedWebPlatformFeatures
   Note�If this Google subkey is not present, create it manually. For the steps to do this, see the "More Information" section.
3. On the Edit menu, point to New, and then click String Value.
4. Type 1, and then press Enter.
5. Right-click the 1 string value that you created, and then click Modify.
6. In the Value data box, type ShowModalDialog_EffectiveUntil20150430, and then click OK.
7. Exit Registry Editor.

We're working to address this problem. We will post more information in this article when the information becomes available.

If the Google subkey is not present when you perform step 2 of the procedure in the "Workaround" section, manually create the subkey. To do this, follow these steps:

1. Locate and then click the following registry subkey:
   HKEY_LOCAL_MACHINE\SOFTWARE\Policies
2. On the Edit menu, point to New, and then click Key.
3. Type Google, and then press Enter.
4. Select the Google subkey that you created, point to New on the Edit menu, and then click Key.
5. Type Chrome, and then press Enter.
6. Select the Chrome subkey that you created, point to New on the Edit menu, and then click Key.
7. Type EnableDeprecatedWebPlatformFeatures, and then press Enter.

Third-party information disclaimer

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.