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PSTN users VM not delivered to subscriber

Hi ,

I am facing an strange issue in cisco unity 5.0 with Exchange 2003 and exchange 2010.

Whenever an local ip phone user calls and leaves a voice mail to another user, the message will get delivered to subscriber mailbox successfully.

But if any PSTN user calls the IP Phone user and leaves a voice mail it does not get delivered to subscriber mail box , instead VM moves to "UnityMTA/failed" folder.

In event viewer i get logs of  CiscoUnity_UMR error.

Event Type:          Error

Event Source:          CiscoUnity_UMR

Event Category:          UMR Thread Error

Event ID:          113

Date:                    1/14/2014

Time:                    7:39:57 PM

User:                    N/A

Computer:          UNIWELSERV01


A message with the subject:

Message from 91966445XXXX

to recipient hp_utpalbhattacharjee could not be delivered [Error:800404DC]. It was moved to the failed directory.  This can occur for several reasons: the recipient mailbox may be disabled or inaccessible, Cisco Unity may be having trouble connecting with the partner server, or the Cisco Unity messaging component may not be properly configured.  If this condition persists, contact Cisco TAC. 0x00001098

i have also deleted and re-created MAPI  , still no luck.

Can someone help me on this ,

Thanks in advance,


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