Altigen AltiContact Manager Version 4.6 Administration Manual page 423

Make sure that the E-mail Name field contains alphanumeric
characters only and does not contain other characters such as spaces
( ) or periods ( . ).
3. In Exchange Administrator, ensure that for each mailbox in Microsoft
Exchange Server to be synchronized, the First Name and Last Name
are exactly as they appear in their corresponding extensions in ACM
Administrator.
Important:The Middle Initial field should be empty for Exchange
Server mail accounts in order for Exchange Integration to
work properly.
Figure 18. Mail account configuration in Exchange Administrator
4. Use these preceding steps to double check the synchronization of all
mailbox names used jointly by AltiContact Manager and Exchange
Server.
AltiContact Manager Administration Manual
Data and Internet Integration
21-23