The sync account does not need to be domain admin. Just a normal/standard domain user.
Why can you not create an account in AD?
Also whether or not the account appears in CUCM before integration is irrelevant. If you have an AD account for yourself, you can use that. If it doesn't work you probably have your settings wrong; usually people get the Account DN wrong.
Post up the settings you are trying to use, and a screen grab of the account in your directory showing it's location (i.e. which OU, which domain name etc).
OK - so basically your test domain isn't set up fully. RIDs are assigned by one of the 'special' DC roles, I can't quite recall which but in the olden days of Windows 2000/2003 I think you had to seize these roles using the AD administrative tools.
I would test the AD integration instead using an existing AD account - e.g. whichever account you are logging on to the DC with.
Please remember to rate helpful posts to identify useful responses, and mark 'Answered' if appropriate!
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.