If you have WordPress installed on Windows (2008 / IIS) with multisite + sub domains enabled you may have run into the issue of login loops / redirects when accessing /wp-admin. Below are a few spots you may want to confirm you have the correct URLs:
In the database:
Table / Field
wp_blogs / domain wp_options / siteurl wp_options / home wp_sitemeta / siteurl (don't forget this one!)
Also check these tables in any additional sites (ie: wp_2_options).
Config Files
wp-config.php:
define('DOMAIN_CURRENT_SITE', 'www.yourdomain.com');
I also have this in my wp-config.php:
define('ADMIN_COOKIE_PATH', '/'); define('COOKIE_DOMAIN', ''); define('COOKIEPATH', ''); define('SITECOOKIEPATH', '');
Web Config
Below is my successful web.config
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<system.webServer>
<rewrite>
<rules>
<rule name="WordPress Rule 1" stopProcessing="true">
<match url="^index\.php$" ignoreCase="false" />
<action type="None" />
</rule>
<rule name="WordPress Rule 2" stopProcessing="true">
<match url="^([_0-9a-zA-Z-]+/)?wp-admin$" ignoreCase="false" />
<action type="Redirect" url="{R:1}wp-admin/" redirectType="Permanent" />
</rule>
<rule name="WordPress Rule 3" stopProcessing="true">
<match url="^" ignoreCase="false" />
<conditions logicalGrouping="MatchAny">
<add input="{REQUEST_FILENAME}" matchType="IsFile" ignoreCase="false" />
<add input="{REQUEST_FILENAME}" matchType="IsDirectory" ignoreCase="false" />
</conditions>
<action type="None" />
</rule>
<rule name="WordPress Rule 4" stopProcessing="true">
<match url="^" ignoreCase="false" />
<conditions logicalGrouping="MatchAny">
<add input="{REQUEST_FILENAME}" matchType="IsFile" ignoreCase="false" />
<add input="{REQUEST_FILENAME}" matchType="IsDirectory" ignoreCase="false" />
<add input="{URL}" pattern="([a-zA-Z0-9\./_-]+)\.axd" />
</conditions>
<action type="None" />
</rule>
<rule name="WordPress Rule 5" stopProcessing="true">
<match url="^[_0-9a-zA-Z-]+/(wp-(content|admin|includes).*)" ignoreCase="false" />
<action type="Rewrite" url="{R:1}" />
</rule>
<rule name="WordPress Rule 6" stopProcessing="true">
<match url="." ignoreCase="false" />
<action type="Rewrite" url="index.php" />
</rule>
</rules>
</rewrite>
<httpRedirect enabled="false" destination="http://www.yourdomain.com" />
</system.webServer>
</configuration>