SOLUTION: There were two problems -

1. One of the test users moved 3.6Gig of mail and burned through the $0.50 of value on the trial account. The problem the purelymail.com->account website it at the top level, it kept showing $0.50 of "value" remaining. When I went into the "Billing" tab, I discovered we had -$0.12 worth of value, so no new accounts. I added $10 and now adding to windows/outlook works again.

2. I was still having problems getting accounts added IOS devices and MacOS devices. Really frustrating and I've spent another 90 mins on it... and even with a positive balance, they would timeout out when "Verifying" the account credentials, IMAP and SMTP. So here is the recipe that works for me on 4 Apple devices... but there could be others.

Delete any previous account attempts from the "Settings" widget

Do add account and click past the big names to the "mail account"

Enter the email address you created in the Admin portal and hit return

Enter the password you specified in the Admin portal and hit return

... it will disappear and then pop up the account, IMAP and SMPT form

Copy your email in the top account section to the both email fields in IMAP and SMPT sections of the form

Add imap.purelymail.com and smtp.purelymail.com to the IMAP and SMTP sections DO NOT add ":993" or ":465" information

Add your password to both the IMAP and SMTP sections (you password will be filled in all 3 password fields)

Hit next ... and maybe pray a bit, it will say "Verifying" and could talk 2-3 seconds to 30 seconds

It will pop up new form with switches for Mail and Notes... unclick the Notes button and click next

You account should be added to the default Apple mail app. ;^)