Unlisted message error on BB handset while sending meeting request

When sending a meeting request from the Blackberry handset which is running on BES 5.0 SP4 MR4 whose mailbox is on Exchange server 2010, getting red X and on the Blackberry Handset for which the message status shows: Unlisted message error

To fix the issue i have followed the below steps

Open Command Prompt
Browse to the tools folder where you have TraitTool

Traittool -server <Server Name> -list

You should be seeing 4 entries as mentioned below:

EWSEnable: True
EWSSCPURL: https://outlookanywhere.domain.com/Autodiscover/Autodiscover.xml
EWSCASURL:https://outlookanywhere.domain.com/EWS/Exchange.asmx
ExchangeDisableConfirmEmailDelivery:0

From the above command, i have confirmed EWS is enabled on the server. 

I have assigned the blackberry account to the static agent 214 and while testing the calendaring functionality by creating a new meeting request, it went without red X. Calendar functionality is working fine on agent 214 without any issue.

Now i went to still deeper level i.e agent level

Traittool -server <Server Name> -agent 1 -list
EWSEnable:true
Traittool -server <Server Name> -agent 2 -list
Traittool -server <Server Name> -agent 3 -list
Traittool -server <Server Name> -agent 4 -list
Traittool -server <Server Name> -agent 5 -list
Traittool -server <Server Name> -agent 212 -list
Traittool -server <Server Name> -agent 214 -list
EWSEnable:true

When i have assigned the blackberry account to static agent 212, the calendar functionality is not working fine i am receiving red X with the message status: unlisted message error. From the above information i got to know as the EWS is not enabled for the agent 212, the calendaring functionality is not working.

To fix the issue at the static agent level, i ran the below command and restarted the BB Controller service.

TraitTool -server <Server Name> -agent 212 -Trait EwsEnable -set true
ewsenable: Added 'true' Server: <Server Name>(2), Agent: 212(212)

Now i have tested the calendar functionality by sending the meeting request now it reached the recipients without any issues i.e red X 

Finally i have fixed the issue :)

Reference KB29946