Add Office 365 Tenant Proxy Address to Exchange objects with Email Address Policy Disabled

If your organization is like a lot of them out there, you have mailbox users without the email address policy applied.  It's a pretty common practice to work around name changes, users with similar names or middle initials, or one-off primary SMTP addresses.

If that's the case, then you probably have received this error when trying to move a mailbox:

"Target mailbox doesn't have an SMTP proxy matching '<domain>'"

We detail this message and the cause in, but how to fix it for a bunch of people?  Fortunately, there's a script for that.

Download this script and run it from the Exchange Management Console.  You can specify a -Searchbase to scope it to a particular OU as well as target all users without the email address policy applied or only a specific user.

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