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Unable to expand Exchange 2010 public folders from an Exchange 2016 hosted mailbox with Outlook 2013

Problem You’ve used the following TechNet article to allow Exchange 2016 mailboxes to access your Exchange 2010 public folders during a migration: Configure legacy public folders where user mailboxes are on Exchange 2013 servershttps://technet.microsoft.com/en-us/library/dn690134(v=exchg.150).aspx You’ve confirmed that the configuration in the article has been completed

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Attempting to delete an Exchange Server 2016 mailbox database previously used to migrate public folders from Exchange 2010 throws the error: “This mailbox database is associated with one or more active PublicFolderMailboxMigration requests…”

I recently had to assist a client with migrating their Exchange Server 2010 public folders to Exchange Server 2016 and ran into a situation where the mailbox database storing the public folder mailboxes would throw the following error message when I attempt to delete it

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Rerouting outbound SMTP mail through Exchange 2016 Send Connectors from Exchange 2010 fails with: 451 4.4.0 Primary target IP address responded with: “421 4.3.2 Service not available.”

Problem You’re currently migrating from Exchange Server 2010 to 2016 and have just reconfigured the Send Connectors to route outbound SMTP mail through Exchange 2016 but notice that sent emails are stuck in the Exchange 2010 queues with the following error: 451 4.4.0 Primary target

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Microsoft Remote Connectivity Analyzer’s Exchange ActiveSync test fails at “Validating certificate trust for Windows Mobile devices.” when publishing Exchange 2016 services with Citrix NetScalers

Problem You’ve successfully published your Exchange 2016 services with Citrix NetScalers but noticed that when you run the Microsoft Remote Connectivity Analyzer’s Exchange ActiveSync test at https://testconnectivity.microsoft.com, it fails at the Validating certificate trust for Windows Mobile devices. test. The Microsoft Connectivity Analyzer is testing

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