Meeting invitation not sent to a user

L

luuke57

Member
Outlook version
Outlook 2010 32 bit
Email Account
Exchange Server
Operating system::    windows 2019
Outlook version:     2016
Email type or host:    Exchange 2016
Good day everyone,

I don't know if I have to post it in Exchange or in Outlook forum, we'll see...
Exchange on-prem 2016, Outlook 2016.
A user sent a Skype meeting invitation to 4 internal recipients (A, B, C and D).
3 got it (A, B and C), 1 (D) did not.
Invitation in the Sent Items of the organizer displays the 4 recipients.
Organizer did not get any non-delivery report.
Checked Message Tracking Logs, I can see the invitation has been sent to A, B and C, but not recipient D.
I used MFCMapi to see the properties of the message, and there is a strange one:
PidLidNonSendableTo, and the value is D's mailbox.
As there is no trace of the message sent to D in the tracking log files (but A, B and C appear), I would say that my Exchange had no idea that it had to deliver the message to a 4th mailbox.
Again, message in the Sent Items display all 4 invitees, and Organizer did not get any error message/non-delivery report...

I found some information on that property, that turn around either the sender cannot send messages to that recipient, or that the mailbox was... corrupted, but it always worked with that user and nothing happened on that mailbox (no database move for example).

So... what can cause the message not to be sent to an internal recipient, without informing the sender of this problem ?

Thanks :-)

Luuke
 
Either forum is ok. :) I may eventually merge the two.

luuke57 said:
Exchange on-prem 2016, Outlook 2016.
A user sent a Skype meeting invitation to 4 internal recipients (A, B, C and D).
3 got it (A, B and C), 1 (D) did not.
Invitation in the Sent Items of the organizer displays the 4 recipients.
Organizer did not get any non-delivery report.
Checked Message Tracking Logs, I can see the invitation has been sent to A, B and C, but not recipient D.
I used MFCMapi to see the properties of the message, and there is a strange one:
PidLidNonSendableTo, and the value is D's mailbox.
As there is no trace of the message sent to D in the tracking log files (but A, B and C appear), I would say that my Exchange had no idea that it had to deliver the message to a 4th mailbox.
Again, message in the Sent Items display all 4 invitees, and Organizer did not get any error message/non-delivery report...

I found some information on that property, that turn around either the sender cannot send messages to that recipient, or that the mailbox was... corrupted, but it always worked with that user and nothing happened on that mailbox (no database move for example).

So... what can cause the message not to be sent to an internal recipient, without informing the sender of this problem ?
Click to expand...


I'm thinking it might be a corrupt autocomplete entry. Can the user send mail to D?
 
Yes, he can... He sent another invite to that person 45 minutes before, and another e-mail later in the afternoon...
If it had been a corrupt autocomplete entry, I assume the sender would have seen a mailtip notification (like the one you have when someone has set up an Out of Office or when an internal mailbox does not exist anymore), wouldn't he?

Thanks :)
 
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