Merge pull request MicrosoftDocs#7010 from mahage-msft/patch-2

Removed Exchange Online

Author: markjjo

exchange/exchange-ps/exchange/Search-Mailbox.md

@@ -1,7 +1,7 @@
 ---
 external help file: Microsoft.Exchange.RecordsandEdge-Help.xml
 online version: https://docs.microsoft.com/powershell/module/exchange/search-mailbox
-applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Online
+applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019
 title: Search-Mailbox
 schema: 2.0.0
 author: chrisda