Solved: this was bad XML. <s> element and <e> element are siblings; I put <e> element as child to <s>.
Making SOAP request (shown below) to create appointment, results in appointment 1 second long. Also, this call allows entering duplicate busy events at same time (that may be correct).
I tried this using <e d="20110405T131500Z"/>, and tried using <dur m="30"/>, both resulting with same results.
Please give advise on how to properly create appointment of any given length (15 min, 1/2 hour, 1 hour, etc).
Zimra full version info: Release 6.0.8_GA_2661.RHEL5_64_20100824100342 CentOS5_64 NETWORK edition.
Here is example request being made (left out SOAP envelope -- let me know if you need the entire request):
name="Test 04-05 15min"