Never got this error before and strangely enough no search engine results on it either. Using Exchange management console to Enable UM on a mailbox. Full text of the error message is; Unexpected error (0x7237D20B) while executing commend 'Enable-UMMailbox -Identity 'some user identity' -UMMailboxPolicy 'MyDialPlan Default Policy' -ValidateOnly' It did allow me to continue and after manually entering extension it did enable the mailbox for UM/voicemail... Any idea about meaning or cause of this error messages ?

Hello Thank you for your question. I am trying to involve someone familiar with this topic to further look at this issue. Terence Yu TechNet Community Support

Hello Spent sometime trying to figure out out what this stands for 0x7237D20B However there seem to be no references at all. Hopefully the error code pasted doesnot have typos in it Thaks Prasanth