Error: Exception occurred while editing mailbox on Build 09

Hi
 
OS: Windows Server 2012 Standard 64 bit 
HC9 Build 09 (latest) 
MailEnable Enterprise Edition 8.50 (latest)
 
After upgrading to HC9 Build 09, we are getting the following message while trying to do any change in any Mailbox (Password, Size, ...)
 
Error : 72302050 : Exception occurred while editing mailbox.
 
Anyone faced this issue before ???
 
Note: This issue wasn't there in Build 08
 
Thanks,