SYMPTOMS
'Administrative Limit Exceeded' error is returned upon expanding a node of a Microsoft Exchange 5.5 email server.
WORKAROUND
In the Exchange Administrator, under Protocols -> LDAP -> Search tab, you have to configure LDAP to return a number of search results greater than the number of entries in your GAL. Be very careful if you have a large GAL since you will return all entries. Several thousand could result in many megabytes of data being transferred which may affect your mail server performance.