SQL Server 2012 Availability Group Replica Not Synchronizing

For some reason one of the databases in the availability group was stuck "Not Synchronizing" for a few days. A simple way to fix it was to simply pause & resume it using the SQL command found here: http://msdn.microsoft.com/en-us/library/ff877974.aspx

alter database <databasename> set hadr pause
alter database <databasename> set hadr resume

Synchronization immediately re-started and the database is now catching back up.  I'm not sure what happened, the event logs didn't show anything helpful but this did the trick.
:-\

Exchange Management Console 2010 Send on Behalf of Error

I was trying to add a user to send on behalf of somebody else, and when I tried to apply the settings I got the following error:

--------------------------------------------------------
Microsoft Exchange Error
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The following error(s) occurred while saving changes:

Set-Mailbox
Failed
Error:
Couldn't find object "domain.local/retired/staff/personsname". Please make sure that it was spelled correctly or specify a different object. Reason: The recipient domain.local/retired/staff/personsname isn't the expected type.


The solution was to open ADSI Edit, navigate to the user I was trying to grant the permissions for, find the publicDelegates setting, and remove the user being referenced.  Problem solved. :)