# Upgrading a System With Advanced UM

After you perform an upgrade:

- If your system is connected to a Microsoft Exchange mail server and is configured to obtain user data from an LDAP server, confirm that the Advanced UM Email and Advanced UM Password fields are populated automatically. For MAPI implementations, the password will be "default" as actual end user passwords are not required.

- If your system is not configured to obtain user data from an LDAP server or is connected to a Google Apps mail server, the user data (email and password) must be reentered on the Web Console or Web View interface. See Enable Advanced UM for a User Mailbox for the required steps.