I'm actually really surprised that you only have this issue with some VMs. Are you absolutely sure it doesn't happen on all the VMs?
Back a year or two ago when I still allowed myself to suffer through using MAPIEx, I ran tests now and then sending thousands of emails and tried it on a few machines. I couldn't get it to have a higher success rate of the actions working than about 90%. That means 9 out of 10 times. That was for sending emails. For receiving, I remember it not working even on retries and we had to restart the BP runtime resource (the machine or just the BP Windows process maybe) for it to start working again.
Blue Prism released the MS Outlook Email VBO, which comes with BP 6.3 (I think) and can also be downloaded from the Digital Exchange. It comes with its own issues to experie...I mean...It comes with it's own fun. But most of us tend to agree that it is far better than MapiEx.
If you haven't used the MS Outlook Email VBO, I'd suggest trying it. And while you're at it, you may as well try Ami Barrett's version
here. which fixes some issues and gives some of the capability back that was lost in the creation of the MS Outlook Email VBO compared to MAPIEx.
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Dave Morris
3Ci @ Southern Company
Atlanta, GA
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Dave Morris, 3Ci at Southern Company