Merge mailbox folders using EWS (with throttling support)

A PowerShell script that uses EWS (requires the EWS Managed API) to merge folders within a mailbox.  Can be used for multiple folders, and automated against multiple mailboxes.  The script handles throttling and so works against large Office 365 mailboxes.

 
 
 
 
 
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Exchange
10/23/2019
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Verified on the following platforms
Windows 10 Yes
Windows Server 2012 Yes
Windows Server 2012 R2 No
Windows Server 2008 R2 Yes
Windows Server 2008 No
Windows Server 2003 No
Windows Server 2016 No
Windows 8 Yes
Windows 7 Yes
Windows Vista No
Windows XP No
Windows 2000 No
This script is tested on these platforms by the author. It is likely to work on other platforms as well. If you try it and find that it works on another platform, please add a note to the script discussion to let others know.