Exchange Powershell: list all Mailboxes with GUID

I ran in to the problem identifying a mailbox by a partial GUID.

If Outlook has a synchonization problem it gives you the url with a partial GUID. With the following comand you can list all mailboxes.

Get-Mailbox -ResultSize Unlimited -RecipientTypeDetails UserMailbox,SharedMailbox | Select-Object UserPrincipalName, ExchangeGuid

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