Allow me to help and provide you with additional information regarding QuickBooks Messenger issues in QuickBooks Desktop.
It may be worthwhile speaking to our QuickBooks Desktop Team about this, I'd be interested to see if they can identify any issues on their end. I'll be available to have this case escalated to the appropriate channels so you're able to reach a point of resolution as quickly as possible
As soon as an update is received, I will be happy to update this thread and let everyone know so that you can get back to business.
For now, I'd suggest reaching out to our QuickBooks Desktop Support to have this re-investigated.
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You can always get back to me if you have additional questions about QuickBooks Messenger. Have a good one.