Understanding the Importance of MRS Proxy in Hybrid deployment Model – Office 365

Hello office 365 Admins, In one of the projects we worked on, we had an exchange 2013 servers and we tried to set up the hybrid configuration wizard (HCW) in order to migrate mailboxes to office 365, as usual we installed AD Connect and synced users to Azure active directory. All HCW prerequisites was met …

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Exchange 2013/2010 – 421 4.4.2 Connection dropped due to SocketError

Hello Exchange Experts, couple of my customers have an exchange 2013 servers reported that they faced a strange issue in their exchange servers. Some of sent emails for specific domains┬ástuck in the queue shown an error as below: ‘400 4.4.7 Message delayed’ – Remote Server at┬áCustomerdomain.com (xxx.xxx.145.250) returned ‘441 4.4.1 Error encountered while communicating with …

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