#Connect to Exchange online
#jared.heinrichs@domain.com exists.

#If I type:
get-recipient -filter {emailaddresses -like "*jared.heinrichs@domain.com*"}
<#
=============================================================
It returns
Name            RecipientType
----            -------------
Jared Heinrichs UserMailbox
=============================================================
#>

$MigratedEmailAddress = "jared.heinrichs@domain.com"
get-recipient -filter {"emailaddresses -like '*'$MigratedEmailAddress'*"}
<#
=============================================================
Cannot bind parameter 'Filter' to the target. Exception setting "Filter": "Invalid filter syntax. For a description of the
filter parameter syntax see the command help.
""emailaddresses -like '*'$MigratedEmailAddress'*"" at position 1."
At C:\Users\********\AppData\Local\Temp\tmp_wc1ehair.2xn\tmp_wc1ehair.2xn.psm1:28581 char:9
+         $steppablePipeline.End()
+         ~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : WriteError: (:) [Get-Recipient], ParameterBindingException
    + FullyQualifiedErrorId : ParameterBindingFailed,Microsoft.Exchange.Management.RecipientTasks.GetRecipient

=============================================================
#>