Unable to get new-testcasconnectivityuser.ps1 to run

I am getting the typical error about the OU not existing or the password not meeting complexity requirements.   Googled it and find tons of web pages with suggestions...   

1. Try adding -OU with the specific OU at the end.

D:\Program Files\Microsoft\Exchange Server\V14\Scripts>.\new-TestCasConnectivityUser.ps1 -OU"mydomain\Users"

Same error.

2. Try setting the OU in the script by changing line 171 to be more specific:

$OrganizationalUnit = "mydomain\Users"

Same error.

3. Try removing the -OrganizationalUnit:$OrganizationalUnit from line 49

Same error.

In Event Log I find where it is trying to create the test user account and failing.    

Question: Can I just create the test user manually like the hundreds of mailboxes we create every day?

Any input/advice is welcomed, I'm about to throw my computer out the window.

where I have mydomain in the text above, in the actuall commands or scripts I have my actual domain name.

Jason Meyer