Ended up taking PSTs home to take advantage of much faster bandwidth. Only real issue I had was bandwidth related. There are third party apps/services as well. Keep your company informed with what to expect.ĭo I use IMAP migration or PST? Which one is easy and safe? - I used PST. If your conversing with entities outside the your country, expect a prolonged propagation. Local DNS (USA) didn't take long, (GFW of) China on the other hand took over 24 hours (we do business over there). Depending on what services/plans you intend to use, DNS can require some time to implement.Īs standard how much time do I need to done this job.

Two MX records to two seperate IPs/Servers/domains will work otherwise if you want to do incremental migration.

I edited DNS after last mailbox migrated. Thoroughly familiarize yourself with the migration procedure.ĭo I need to change DNS records after I add the custom domain to Office 365 or after migrated the users for minimum downtime. * What's prerequisite and which steps should I take first? - M$ has some tutorials out there. Same domain for O365? The you will have to kill GoDaddy DNS and point to new O365 IP/Server before going active. * We want to keep only domain name at GoDaddy.

Also backed up head shed's email older than X/X/XX date, but didn't migrate. I went as far as to login to each mailbox and deleted as much junk as possible (LinkedIn, offers, junk, etc.) It was also decided to delete any emails older than X/X/XX date. Instruct users to remove as much email as possible. * Migration of 50 users email address, some users have a lot of data and some of them not.

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