
Feb 20, 2015
In today’s blog I will talk about planning for Exchange online and discuss the correct DNS configurations required for a successful coexistence or migration. Before you start migration or coexistence, you need to analyse your organisations environment. There are various factors that you should analyse. Mailbox size: You should plan for reduction on the premise of your mailbox size. It is one of the major factors that define the time it will take to migrate to Exchange Online. Internet speed: Controls the duration of migration. DNS configuration: You need to plan and create the required MX, CNAMES and Autodiscover records well in advance. Apart from these core factors, you should also plan for efficient retention, journal entry and archiving. The exchange online service uses several records Autodiscover CNAME records for client Autodiscovery, and a Sender Policy framework (TXT) record for anti-spam protection.
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