Migrating to office 365 E3

ZeeK
ZeeK used Ask the Experts™
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Already started moving from physical servers to office365 E3. As migration may be hectic at the moment. Is it the good idea to start email services at O365 and migrate old pst of email account at some later point. Would that make any difference?
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AmitIT Architect
Distinguished Expert 2017
Commented:
If you are planning to create new id for current users and merging the data. I don't see any issue. Once migration is over, you can either switch back data to old id again. Only issue is extra admin effort. If user base is low, that won't be an issue.
Business Consultant (Owner)
Most Valuable Expert 2012
Expert of the Year 2018
Commented:
Delaying the migration of the PST files will help you. But your users may not be happy. It really comes down to that choice so far as I can see and only you (and your users) can make it.

Author

Commented:
Planning to create same ids as old server and merge data at later stage. Would that be ok?
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JohnBusiness Consultant (Owner)
Most Valuable Expert 2012
Expert of the Year 2018

Commented:
Yes. that will work. Make sure your users understand your plan.
JohnBusiness Consultant (Owner)
Most Valuable Expert 2012
Expert of the Year 2018

Commented:
Thank you, and I was happy to help.
Mohammed HamadaSenior IT Consultant

Commented:
Depends on how you are migrating emails and users? do you have hybrid integration or you are using IMAP Migration?

Author

Commented:
I would only keep pst files of old emails. To upload and merge them directly to office 365

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