I am working with a group that started using Office Online 365 but have been having many issues. They now want to go to Gsuite. What is the best way to make sure they have all of their past emails and contacts from Office 365 to GSUITE?
Posted Sep 10, 2018, 10:25 PM UTC
Partially depends on the number of users and size of mailboxes. There is an online tool that has three modes: email, calendar, or contacts. You can upload a list of mailboxes to migrate.
I’ve had trouble using the utility. It wouldn’t find the correct number of items in several accounts during our alpha test. Because of this I downloaded the Exchange migration utility and proceeded the mailboxes with that.
The exchange migration utility requires you use Outlook 2013 or lower. Office365 will not give you that version though. I had to buy one off ebay... but then it worked well.
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There a few cloud solution tools that when migrating can pull old emails, contacts, calendar events while you migrate and then run a delta again to catch up on anything that might of been sent over a weekend for example.
Not sure if you are a Google partner, G Suite reseller or IT for the company, but exploring partners to help with migrating helps as well.
Best is to Export Office 365 EMails and Contacts in PST file format and then import PST file to Gsuite account using GAMMO Tool. To backup Office 365 to PST SysTools Office 365 Backup is the best option. Ref: https://www.systoolsgroup.com/office365-backup/
Implementation has a sync tool. They sync email from the most recent back to whatever time period you set all while syncing new emails going forward. You can use the gsuite while it's still syncing or wait until all email from all time is fully sync'd. Also syncs calendar, contacts, and windows logins at your discretion.