Notes - Altigen MAXCS ACC 6.5 Administration Manual

Chapter 28: Microsoft Exchange Integration
To avoid "Access Deny" error while sending messages
If you have applied Microsoft patch ms06-029, when an AltiGen PBX phone user
attempts to send a message, the user receives an "Access Deny" error. This is because
the patch changes the grant for the permission of Send As.
After applying the patch, the Send As permission of each user needs to be granted to
the account of "altigen service" explicitly.
You may have to restart the Exchange Server and MAXCS.

Notes

Prevent attempts by the Exchange Administrator/Manager to use the existing
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service account for the AltiGen Exchange Integration Service. Using the AltiGen
service account will provide you an audit trail that is invaluable while
troubleshooting.
Depending on the number of voice mails you have on the AltiGen server, the initial
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mailbox synchronization may take a long time.
For example, if you have 10GB of voice mails on the AltiGen server and are enabling
Exchange integration for all the mailboxes, it may take up to 24 hours to initialize
the Exchange integration service.
On the other hand, if you have less than 100MB of voice mails on the AltiGen server,
the initialization will take less than 5 minutes.
If users experience a problem making calls to the Exchange 2007 server, make sure
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the MSXML 6.0 Parser has not been deleted from the server. Without it, the speech
engine services cannot play voice prompts.
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MAXCS ACC 6.5 Administration Manual