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3tproFlag for United States of America asked on

Exchange Delivery Failure 5.1.7

When one of our users does the following from OWA or from PDA / active sync they get:

System Attendant on "Date"
The email address could not be found. Perhaps the recipient moved to a different e-mail organization, or there was a mistake in the address. Check the address and try again.
<mail."our domain name" #5.1.7>

1. Delete calendar entry using OWA
2. Reply to message from PDA using active sync
3. Delete calendar entry from Outlook
4. Add calendar entry from Outlook
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Last Comment
3tpro

8/22/2022 - Mon
Roger H. Svensrud

I haven't experienced that problem myself, but the 5 in the status code means it's a permanent error, and:

X.1.7   Bad sender's mailbox address syntax

          The sender's address was syntactically invalid.  This can
          apply to any field in the address.

Hope this helps.
ASKER
3tpro

We have verified every aspect of this users mailbox but do not see the problem. His attributes appear to be the same as everyone else on the organization.
Roger H. Svensrud

Just to clarify:
Is he experiencing the problem only when using OWA or PDA/ActiveSync?
What if he performs the same operations using Outlook?
(For example: Can he reply to messages when using Outlook?)

Is there any difference when replying to internal as opposed to external recipients?

Since it even happens when adding a calendar entry, the problem seems to be connected to the user itself...
Your help has saved me hundreds of hours of internet surfing.
fblack61
ASKER
3tpro

Sure -
1. Delete calendar entry using OWA
2. Reply to message from PDA using active sync
3. Delete calendar entry from Outlook
4. Add calendar entry from Outlook

- Outlook replies work fine
- Outlook Calendar entries have the same issue

- I agree it seems to be a user issues and not a global issue.
ASKER
3tpro

Does anyone have any ideas on this issue?
Roger H. Svensrud

Does it make any difference if you delete his Outlook profile (from control panel, e-mail), and create a new one, preferably with a different name?

Does that have any effect on the issues experienced from Outlook?
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ASKER
3tpro

We are considering backing up all email and then deleting the account totally and adding again. We will advise.
Roger H. Svensrud

Yes, that would be my nex suggestion.
No point in spending too much time on weird problems, when the alternative is easier...
ASKER CERTIFIED SOLUTION
3tpro

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