Microsoft Exchange Performance Counters

Microsoft Exchange Common Domain Controllers Connectivity counters

The following table shows Exchange domain controllers connectivity counters.

Counter Name	Description
MSExchange ADAccess Caches(*)\LDAP Searches/Sec
MSExchange ADAccess Domain Controllers(*)\LDAP Read Time	Shows the time in milliseconds (ms) to send an LDAP read request to the specified domain controller and receive a response.
MSExchange ADAccess Domain Controllers(*)\LDAP Search Time	Shows the time (in ms) to send an LDAP search request and receive a response.
MSExchange ADAccess Domain Controllers(*)\LDAP Searches timed out per minute	Shows the number of LDAP searches that returned LDAP_Timeout during the last minute.
MSExchange ADAccess Domain Controllers(*)\Long running LDAP operations/Min	Shows the number of LDAP operations on this domain controller that took longer than the specified threshold per minute. (Default threshold is 15 seconds.)
MSExchange ADAccess Processes(*)\LDAP Read Time	Shows the time (in ms) to send an LDAP read request to the specified domain controller and receive a response.
MSExchange ADAccess Processes(*)\LDAP Search Time	Shows the time (in ms) to send an LDAP search request and receive a response.